1 This file contains a description of all the shell variables whose value is
2 determined by the Configure script. Variables intended for use in C
3 programs (e.g. I_UNISTD) are already described in config_h.SH. [`configpm'
4 generates pod documentation for Config.pm from this file--please try to keep
5 the formatting regular.]
8 This variable defines the extension used for ordinary libraries.
9 For unix, it is '.a'. The '.' is included. Other possible
10 values include '.lib'.
13 This variable defines the extension used for executable files.
14 For unix it is empty. Other possible values include '.exe'.
17 This variable defines the extension used for object files.
18 For unix, it is '.o'. The '.' is included. Other possible
19 values include '.obj'.
22 This variable is set to 'true' if AFS (Andrew File System) is used
23 on the system, 'false' otherwise. It is possible to override this
24 with a hint value or command line option, but you'd better know
27 alignbytes (alignbytes.U):
28 This variable holds the number of bytes required to align a
29 double. Usual values are 2, 4 and 8.
31 ansi2knr (ansi2knr.U):
32 This variable is set if the user needs to run ansi2knr.
33 Currently, this is not supported, so we just abort.
35 aphostname (d_gethname.U):
36 This variable contains the command which can be used to compute the
37 host name. The command is fully qualified by its absolute path, to make
38 it safe when used by a process with super-user privileges.
40 api_revision (patchlevel.U):
41 The three variables, api_revision, api_version, and
42 api_subversion, specify the version of the oldest perl binary
43 compatible with the present perl. In a full version string
44 such as '5.6.1', api_revision is the '5'.
45 Prior to 5.5.640, the format was a floating point number,
47 perl.c:incpush() and lib/lib.pm will automatically search in
48 $sitelib/.. for older directories back to the limit specified
49 by these api_ variables. This is only useful if you have a
50 perl library directory tree structured like the default one.
51 See INSTALL for how this works. The versioned site_perl
52 directory was introduced in 5.005, so that is the lowest
53 possible value. The version list appropriate for the current
54 system is determined in inc_version_list.U.
55 XXX To do: Since compatibility can depend on compile time
56 options (such as bincompat, longlong, etc.) it should
57 (perhaps) be set by Configure, but currently it isn't.
58 Currently, we read a hard-wired value from patchlevel.h.
59 Perhaps what we ought to do is take the hard-wired value from
60 patchlevel.h but then modify it if the current Configure
61 options warrant. patchlevel.h then would use an #ifdef guard.
63 api_subversion (patchlevel.U):
64 The three variables, api_revision, api_version, and
65 api_subversion, specify the version of the oldest perl binary
66 compatible with the present perl. In a full version string
67 such as '5.6.1', api_subversion is the '1'. See api_revision for
70 api_version (patchlevel.U):
71 The three variables, api_revision, api_version, and
72 api_subversion, specify the version of the oldest perl binary
73 compatible with the present perl. In a full version string
74 such as '5.6.1', api_version is the '6'. See api_revision for
75 full details. As a special case, 5.5.0 is rendered in the
76 old-style as 5.005. (In the 5.005_0x maintenance series,
77 this was the only versioned directory in $sitelib.)
79 api_versionstring (patchlevel.U):
80 This variable combines api_revision, api_version, and
81 api_subversion in a format such as 5.6.1 (or 5_6_1) suitable
82 for use as a directory name. This is filesystem dependent.
85 This variable is used internally by Configure to determine the
86 full pathname (if any) of the ar program. After Configure runs,
87 the value is reset to a plain "ar" and is not useful.
90 This variable holds the name of the directory in which the user wants
91 to put architecture-dependent public library files for $package.
92 It is most often a local directory such as /usr/local/lib.
93 Programs using this variable must be prepared to deal
94 with filename expansion.
96 archlibexp (archlib.U):
97 This variable is the same as the archlib variable, but is
98 filename expanded at configuration time, for convenient use.
100 archname64 (use64bits.U):
101 This variable is used for the 64-bitness part of $archname.
103 archname (archname.U):
104 This variable is a short name to characterize the current
105 architecture. It is used mainly to construct the default archlib.
108 This variable defines any additional objects that must be linked
109 in with the program on this architecture. On unix, it is usually
110 empty. It is typically used to include emulations of unix calls
111 or other facilities. For perl on OS/2, for example, this would
115 This variable is used internally by Configure to determine the
116 full pathname (if any) of the awk program. After Configure runs,
117 the value is reset to a plain "awk" and is not useful.
120 The base revision level of this package, from the .package file.
123 This variable is defined but not used by Configure.
124 The value is a plain '' and is not useful.
127 This variable holds the name of the directory in which the user wants
128 to put publicly executable images for the package in question. It
129 is most often a local directory such as /usr/local/bin. Programs using
130 this variable must be prepared to deal with ~name substitution.
132 bincompat5005 (bincompat5005.U):
133 This variable contains y if Perl 5.006 should be binary-compatible
137 This is the same as the bin variable, but is filename expanded at
138 configuration time, for use in your makefiles.
141 This variable is defined but not used by Configure.
142 The value is a plain '' and is not useful.
145 This variable is used internally by Configure to determine the
146 full pathname (if any) of the byacc program. After Configure runs,
147 the value is reset to a plain "byacc" and is not useful.
149 byteorder (byteorder.U):
150 This variable holds the byte order. In the following, larger digits
151 indicate more significance. The variable byteorder is either 4321
152 on a big-endian machine, or 1234 on a little-endian, or 87654321
153 on a Cray ... or 3412 with weird order !
156 This variable contains the \c string if that is what causes the echo
157 command to suppress newline. Otherwise it is null. Correct usage is
158 $echo $n "prompt for a question: $c".
160 castflags (d_castneg.U):
161 This variable contains a flag that precise difficulties the
162 compiler has casting odd floating values to unsigned long:
164 1 = couldn't cast < 0
165 2 = couldn't cast >= 0x80000000
166 4 = couldn't cast in argument expression list
169 This variable is used internally by Configure to determine the
170 full pathname (if any) of the cat program. After Configure runs,
171 the value is reset to a plain "cat" and is not useful.
174 This variable holds the name of a command to execute a C compiler which
175 can resolve multiple global references that happen to have the same
176 name. Usual values are 'cc', 'Mcc', 'cc -M', and 'gcc'.
178 cccdlflags (dlsrc.U):
179 This variable contains any special flags that might need to be
180 passed with 'cc -c' to compile modules to be used to create a shared
181 library that will be used for dynamic loading. For hpux, this
182 should be +z. It is up to the makefile to use it.
185 This variable contains any special flags that might need to be
186 passed to cc to link with a shared library for dynamic loading.
187 It is up to the makefile to use it. For sunos 4.1, it should
191 This variable contains any additional C compiler flags desired by
192 the user. It is up to the Makefile to use this.
194 ccsymbols (Cppsym.U):
195 The variable contains the symbols defined by the C compiler alone.
196 The list is a space-separated list of symbol=value tokens.
199 Login name of the person who ran the Configure script and answered the
200 questions. This is used to tag both config.sh and config_h.SH.
202 cf_email (cf_email.U):
203 Electronic mail address of the person who ran Configure. This can be
204 used by units that require the user's e-mail, like MailList.U.
207 Holds the output of the "date" command when the configuration file was
208 produced. This is used to tag both config.sh and config_h.SH.
210 charsize (charsize.U):
211 This variable contains the value of the CHARSIZE symbol, which
212 indicates to the C program how many bytes there are in a character.
215 This variable is defined but not used by Configure.
216 The value is a plain '' and is not useful.
219 This variable is defined but not used by Configure.
220 The value is a plain '' and is not useful.
223 This variable is defined but not used by Configure.
224 The value is a plain '' and is not useful.
226 clocktype (d_times.U):
227 This variable holds the type returned by times(). It can be long,
228 or clock_t on BSD sites (in which case <sys/types.h> should be
232 This variable is used internally by Configure to determine the
233 full pathname (if any) of the comm program. After Configure runs,
234 the value is reset to a plain "comm" and is not useful.
237 This variable is defined but not used by Configure.
238 The value is a plain '' and is not useful.
240 CONFIGDOTSH (Oldsyms.U):
241 This is set to 'true' in config.sh so that a shell script
242 sourcing config.sh can tell if it has been sourced already.
244 contains (contains.U):
245 This variable holds the command to do a grep with a proper return
246 status. On most sane systems it is simply "grep". On insane systems
247 it is a grep followed by a cat followed by a test. This variable
248 is primarily for the use of other Configure units.
251 This variable is used internally by Configure to determine the
252 full pathname (if any) of the cp program. After Configure runs,
253 the value is reset to a plain "cp" and is not useful.
256 This variable is defined but not used by Configure.
257 The value is a plain '' and is not useful.
260 This variable is used internally by Configure to determine the
261 full pathname (if any) of the cpp program. After Configure runs,
262 the value is reset to a plain "cpp" and is not useful.
264 cpp_stuff (cpp_stuff.U):
265 This variable contains an identification of the catenation mechanism
266 used by the C preprocessor.
268 cppccsymbols (Cppsym.U):
269 The variable contains the symbols defined by both
270 the bare C compiler and during a compilation that
272 The list is a space-separated list of symbol=value tokens.
274 cppflags (ccflags.U):
275 This variable holds the flags that will be passed to the C pre-
276 processor. It is up to the Makefile to use it.
278 cpplast (cppstdin.U):
279 This variable has the same functionality as cppminus, only it applies
280 to cpprun and not cppstdin.
282 cppminus (cppstdin.U):
283 This variable contains the second part of the string which will invoke
284 the C preprocessor on the standard input and produce to standard
285 output. This variable will have the value "-" if cppstdin needs
286 a minus to specify standard input, otherwise the value is "".
289 This variable contains the command which will invoke a C preprocessor
290 on standard input and put the output to stdout. It is guaranteed not
291 to be a wrapper and may be a null string if no preprocessor can be
292 made directly available. This preprocessor might be different from the
293 one used by the C compiler. Don't forget to append cpplast after the
294 preprocessor options.
296 cppstdin (cppstdin.U):
297 This variable contains the command which will invoke the C
298 preprocessor on standard input and put the output to stdout.
299 It is primarily used by other Configure units that ask about
300 preprocessor symbols.
302 cppsymbols (Cppsym.U):
303 The variable contains the symbols during a compilation
304 that includes stdio.h.
305 The list is a space-separated list of symbol=value tokens.
307 crosscompile (crosscompile.U):
308 This variable conditionally defines the CROSSCOMPILE symbol
309 which signifies that the build process is be a cross-compilation.
310 This is normally set by hints files or from Configure command line.
312 cryptlib (d_crypt.U):
313 This variable holds -lcrypt or the path to a libcrypt.a archive if
314 the crypt() function is not defined in the standard C library. It is
315 up to the Makefile to use this.
318 This variable is used internally by Configure to determine the
319 full pathname (if any) of the csh program. After Configure runs,
320 the value is reset to a plain "csh" and is not useful.
322 d_access (d_access.U):
323 This variable conditionally defines HAS_ACCESS if the access() system
324 call is available to check for access permissions using real IDs.
326 d_accessx (d_accessx.U):
327 This variable conditionally defines the HAS_ACCESSX symbol, which
328 indicates to the C program that the accessx() routine is available.
331 This variable conditionally defines the HAS_ALARM symbol, which
332 indicates to the C program that the alarm() routine is available.
334 d_archlib (archlib.U):
335 This variable conditionally defines ARCHLIB to hold the pathname
336 of architecture-dependent library files for $package. If
337 $archlib is the same as $privlib, then this is set to undef.
340 This variable conditionally defines the HAS_ATOLF symbol, which
341 indicates to the C program that the atolf() routine is available.
344 This variable conditionally defines the HAS_ATOLL symbol, which
345 indicates to the C program that the atoll() routine is available.
347 d_attribut (d_attribut.U):
348 This variable conditionally defines HASATTRIBUTE, which
349 indicates the C compiler can check for function attributes,
350 such as printf formats.
353 This variable conditionally defines the HAS_BCMP symbol if
354 the bcmp() routine is available to compare strings.
357 This variable conditionally defines the HAS_BCOPY symbol if
358 the bcopy() routine is available to copy strings.
360 d_bincompat5005 (bincompat5005.U):
361 This variable conditionally defines BINCOMPAT5005 so that embed.h
362 can take special action if Perl 5.006 should be binary-compatible
363 with Perl 5.005. This is impossible for builds that use features
364 like threads and multiplicity it is always $undef for those versions.
367 This symbol conditionally defines the symbol BSD when running on a
370 d_bsdgetpgrp (d_getpgrp.U):
371 This variable conditionally defines USE_BSD_GETPGRP if
372 getpgrp needs one arguments whereas USG one needs none.
374 d_bsdsetpgrp (d_setpgrp.U):
375 This variable conditionally defines USE_BSD_SETPGRP if
376 setpgrp needs two arguments whereas USG one needs none.
377 See also d_setpgid for a POSIX interface.
380 This variable conditionally defines the HAS_BZERO symbol if
381 the bzero() routine is available to set memory to 0.
383 d_casti32 (d_casti32.U):
384 This variable conditionally defines CASTI32, which indicates
385 whether the C compiler can cast large floats to 32-bit ints.
387 d_castneg (d_castneg.U):
388 This variable conditionally defines CASTNEG, which indicates
389 wether the C compiler can cast negative float to unsigned.
391 d_charvspr (d_vprintf.U):
392 This variable conditionally defines CHARVSPRINTF if this system
393 has vsprintf returning type (char*). The trend seems to be to
394 declare it as "int vsprintf()".
397 This variable conditionally defines the HAS_CHOWN symbol, which
398 indicates to the C program that the chown() routine is available.
400 d_chroot (d_chroot.U):
401 This variable conditionally defines the HAS_CHROOT symbol, which
402 indicates to the C program that the chroot() routine is available.
404 d_chsize (d_chsize.U):
405 This variable conditionally defines the CHSIZE symbol, which
406 indicates to the C program that the chsize() routine is available
407 to truncate files. You might need a -lx to get this routine.
409 d_closedir (d_closedir.U):
410 This variable conditionally defines HAS_CLOSEDIR if closedir() is
414 This variable conditionally defines the HASCONST symbol, which
415 indicates to the C program that this C compiler knows about the
419 This variable conditionally defines the CRYPT symbol, which
420 indicates to the C program that the crypt() routine is available
421 to encrypt passwords and the like.
424 This variable conditionally defines the CSH symbol, which
425 indicates to the C program that the C-shell exists.
427 d_cuserid (d_cuserid.U):
428 This variable conditionally defines the HAS_CUSERID symbol, which
429 indicates to the C program that the cuserid() routine is available
430 to get character login names.
432 d_dbl_dig (d_dbl_dig.U):
433 This variable conditionally defines d_dbl_dig if this system's
434 header files provide DBL_DIG, which is the number of significant
435 digits in a double precision number.
437 d_difftime (d_difftime.U):
438 This variable conditionally defines the HAS_DIFFTIME symbol, which
439 indicates to the C program that the difftime() routine is available.
441 d_dirnamlen (i_dirent.U):
442 This variable conditionally defines DIRNAMLEN, which indicates
443 to the C program that the length of directory entry names is
444 provided by a d_namelen field.
446 d_dlerror (d_dlerror.U):
447 This variable conditionally defines the HAS_DLERROR symbol, which
448 indicates to the C program that the dlerror() routine is available.
450 d_dlopen (d_dlopen.U):
451 This variable conditionally defines the HAS_DLOPEN symbol, which
452 indicates to the C program that the dlopen() routine is available.
454 d_dlsymun (d_dlsymun.U):
455 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
456 indicates that we need to prepend an underscore to the symbol
457 name before calling dlsym().
459 d_dosuid (d_dosuid.U):
460 This variable conditionally defines the symbol DOSUID, which
461 tells the C program that it should insert setuid emulation code
462 on hosts which have setuid #! scripts disabled.
464 d_drand48proto (d_drand48proto.U):
465 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
466 which indicates to the C program that the system provides
467 a prototype for the drand48() function. Otherwise, it is
468 up to the program to supply one.
471 This variable conditionally defines HAS_DUP2 if dup2() is
472 available to duplicate file descriptors.
474 d_eaccess (d_eaccess.U):
475 This variable conditionally defines the HAS_EACCESS symbol, which
476 indicates to the C program that the eaccess() routine is available.
478 d_endgrent (d_endgrent.U):
479 This variable conditionally defines the HAS_ENDGRENT symbol, which
480 indicates to the C program that the endgrent() routine is available
481 for sequential access of the group database.
483 d_endhent (d_endhent.U):
484 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
485 available to close whatever was being used for host queries.
487 d_endnent (d_endnent.U):
488 This variable conditionally defines HAS_ENDNETENT if endnetent() is
489 available to close whatever was being used for network queries.
491 d_endpent (d_endpent.U):
492 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
493 available to close whatever was being used for protocol queries.
495 d_endpwent (d_endpwent.U):
496 This variable conditionally defines the HAS_ENDPWENT symbol, which
497 indicates to the C program that the endpwent() routine is available
498 for sequential access of the passwd database.
500 d_endsent (d_endsent.U):
501 This variable conditionally defines HAS_ENDSERVENT if endservent() is
502 available to close whatever was being used for service queries.
504 d_endspent (d_endspent.U):
505 This variable conditionally defines HAS_ENDSPENT if endspent() is
506 available to finalize the scan of SysV shadow password entries.
508 d_eofnblk (nblock_io.U):
509 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
510 when reading from a non-blocking I/O source.
513 This variable conditionally defines the symbols EUNICE and VAX, which
514 alerts the C program that it must deal with ideosyncracies of VMS.
516 d_fchmod (d_fchmod.U):
517 This variable conditionally defines the HAS_FCHMOD symbol, which
518 indicates to the C program that the fchmod() routine is available
519 to change mode of opened files.
521 d_fchown (d_fchown.U):
522 This variable conditionally defines the HAS_FCHOWN symbol, which
523 indicates to the C program that the fchown() routine is available
524 to change ownership of opened files.
527 This variable conditionally defines the HAS_FCNTL symbol, and indicates
528 whether the fcntl() function exists
530 d_fd_macros (d_fd_set.U):
531 This variable contains the eventual value of the HAS_FD_MACROS symbol,
532 which indicates if your C compiler knows about the macros which
533 manipulate an fd_set.
535 d_fd_set (d_fd_set.U):
536 This variable contains the eventual value of the HAS_FD_SET symbol,
537 which indicates if your C compiler knows about the fd_set typedef.
539 d_fds_bits (d_fd_set.U):
540 This variable contains the eventual value of the HAS_FDS_BITS symbol,
541 which indicates if your fd_set typedef contains the fds_bits member.
542 If you have an fd_set typedef, but the dweebs who installed it did
543 a half-fast job and neglected to provide the macros to manipulate
544 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
546 d_fgetpos (d_fgetpos.U):
547 This variable conditionally defines HAS_FGETPOS if fgetpos() is
548 available to get the file position indicator.
550 d_flexfnam (d_flexfnam.U):
551 This variable conditionally defines the FLEXFILENAMES symbol, which
552 indicates that the system supports filenames longer than 14 characters.
555 This variable conditionally defines HAS_FLOCK if flock() is
556 available to do file locking.
559 This variable conditionally defines the HAS_FORK symbol, which
560 indicates to the C program that the fork() routine is available.
562 d_fpathconf (d_pathconf.U):
563 This variable conditionally defines the HAS_FPATHCONF symbol, which
564 indicates to the C program that the pathconf() routine is available
565 to determine file-system related limits and options associated
566 with a given open file descriptor.
569 This symbol will be defined if the C compiler supports fpos64_t.
571 d_fs_data_s (d_fs_data_s.U):
572 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
573 which indicates that the struct fs_data is supported.
575 d_fseeko (d_fseeko.U):
576 This variable conditionally defines the HAS_FSEEKO symbol, which
577 indicates to the C program that the fseeko() routine is available.
579 d_fsetpos (d_fsetpos.U):
580 This variable conditionally defines HAS_FSETPOS if fsetpos() is
581 available to set the file position indicator.
583 d_fstatfs (d_fstatfs.U):
584 This variable conditionally defines the HAS_FSTATFS symbol, which
585 indicates to the C program that the fstatfs() routine is available.
587 d_fstatvfs (d_statvfs.U):
588 This variable conditionally defines the HAS_FSTATVFS symbol, which
589 indicates to the C program that the fstatvfs() routine is available.
591 d_ftello (d_ftello.U):
592 This variable conditionally defines the HAS_FTELLO symbol, which
593 indicates to the C program that the ftello() routine is available.
596 This variable conditionally defines the HAS_FTIME symbol, which indicates
597 that the ftime() routine exists. The ftime() routine is basically
598 a sub-second accuracy clock.
600 d_Gconvert (d_gconvert.U):
601 This variable holds what Gconvert is defined as to convert
602 floating point numbers into strings. It could be 'gconvert'
603 or a more complex macro emulating gconvert with gcvt() or sprintf.
605 d_Gconvert='gconvert((x),(n),(t),(b))'
606 d_Gconvert='gcvt((x),(n),(b))'
607 d_Gconvert='sprintf((b),"%.*g",(n),(x))'
609 d_getcwd (d_getcwd.U):
610 This variable conditionally defines the HAS_GETCWD symbol, which
611 indicates to the C program that the getcwd() routine is available
612 to get the current working directory.
614 d_getgrent (d_getgrent.U):
615 This variable conditionally defines the HAS_GETGRENT symbol, which
616 indicates to the C program that the getgrent() routine is available
617 for sequential access of the group database.
619 d_getgrps (d_getgrps.U):
620 This variable conditionally defines the HAS_GETGROUPS symbol, which
621 indicates to the C program that the getgroups() routine is available
622 to get the list of process groups.
624 d_gethbyaddr (d_gethbyad.U):
625 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
626 indicates to the C program that the gethostbyaddr() routine is available
627 to look up hosts by their IP addresses.
629 d_gethbyname (d_gethbynm.U):
630 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
631 indicates to the C program that the gethostbyname() routine is available
632 to look up host names in some data base or other.
634 d_gethent (d_gethent.U):
635 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
636 available to look up host names in some data base or another.
638 d_gethname (d_gethname.U):
639 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
640 indicates to the C program that the gethostname() routine may be
641 used to derive the host name.
643 d_gethostprotos (d_gethostprotos.U):
644 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
645 which indicates to the C program that <netdb.h> supplies
646 prototypes for the various gethost*() functions.
647 See also netdbtype.U for probing for various netdb types.
649 d_getlogin (d_getlogin.U):
650 This variable conditionally defines the HAS_GETLOGIN symbol, which
651 indicates to the C program that the getlogin() routine is available
652 to get the login name.
654 d_getmnt (d_getmnt.U):
655 This variable conditionally defines the HAS_GETMNT symbol, which
656 indicates to the C program that the getmnt() routine is available
657 to retrieve one or more mount info blocks by filename.
659 d_getmntent (d_getmntent.U):
660 This variable conditionally defines the HAS_GETMNTENT symbol, which
661 indicates to the C program that the getmntent() routine is available
662 to iterate through mounted files to get their mount info.
664 d_getnbyaddr (d_getnbyad.U):
665 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
666 indicates to the C program that the getnetbyaddr() routine is available
667 to look up networks by their IP addresses.
669 d_getnbyname (d_getnbynm.U):
670 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
671 indicates to the C program that the getnetbyname() routine is available
672 to look up networks by their names.
674 d_getnent (d_getnent.U):
675 This variable conditionally defines HAS_GETNETENT if getnetent() is
676 available to look up network names in some data base or another.
678 d_getnetprotos (d_getnetprotos.U):
679 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
680 which indicates to the C program that <netdb.h> supplies
681 prototypes for the various getnet*() functions.
682 See also netdbtype.U for probing for various netdb types.
684 d_getpbyname (d_getprotby.U):
685 This variable conditionally defines the HAS_GETPROTOBYNAME
686 symbol, which indicates to the C program that the
687 getprotobyname() routine is available to look up protocols
690 d_getpbynumber (d_getprotby.U):
691 This variable conditionally defines the HAS_GETPROTOBYNUMBER
692 symbol, which indicates to the C program that the
693 getprotobynumber() routine is available to look up protocols
696 d_getpent (d_getpent.U):
697 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
698 available to look up protocols in some data base or another.
700 d_getpgid (d_getpgid.U):
701 This variable conditionally defines the HAS_GETPGID symbol, which
702 indicates to the C program that the getpgid(pid) function
703 is available to get the process group id.
705 d_getpgrp2 (d_getpgrp2.U):
706 This variable conditionally defines the HAS_GETPGRP2 symbol, which
707 indicates to the C program that the getpgrp2() (as in DG/UX) routine
708 is available to get the current process group.
710 d_getpgrp (d_getpgrp.U):
711 This variable conditionally defines HAS_GETPGRP if getpgrp() is
712 available to get the current process group.
714 d_getppid (d_getppid.U):
715 This variable conditionally defines the HAS_GETPPID symbol, which
716 indicates to the C program that the getppid() routine is available
717 to get the parent process ID.
719 d_getprior (d_getprior.U):
720 This variable conditionally defines HAS_GETPRIORITY if getpriority()
721 is available to get a process's priority.
723 d_getprotoprotos (d_getprotoprotos.U):
724 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
725 which indicates to the C program that <netdb.h> supplies
726 prototypes for the various getproto*() functions.
727 See also netdbtype.U for probing for various netdb types.
729 d_getpwent (d_getpwent.U):
730 This variable conditionally defines the HAS_GETPWENT symbol, which
731 indicates to the C program that the getpwent() routine is available
732 for sequential access of the passwd database.
734 d_getsbyname (d_getsrvby.U):
735 This variable conditionally defines the HAS_GETSERVBYNAME
736 symbol, which indicates to the C program that the
737 getservbyname() routine is available to look up services
740 d_getsbyport (d_getsrvby.U):
741 This variable conditionally defines the HAS_GETSERVBYPORT
742 symbol, which indicates to the C program that the
743 getservbyport() routine is available to look up services
746 d_getsent (d_getsent.U):
747 This variable conditionally defines HAS_GETSERVENT if getservent() is
748 available to look up network services in some data base or another.
750 d_getservprotos (d_getservprotos.U):
751 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
752 which indicates to the C program that <netdb.h> supplies
753 prototypes for the various getserv*() functions.
754 See also netdbtype.U for probing for various netdb types.
756 d_getspent (d_getspent.U):
757 This variable conditionally defines HAS_GETSPENT if getspent() is
758 available to retrieve SysV shadow password entries sequentially.
760 d_getspnam (d_getspnam.U):
761 This variable conditionally defines HAS_GETSPNAM if getspnam() is
762 available to retrieve SysV shadow password entries by name.
764 d_gettimeod (d_ftime.U):
765 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
766 indicates that the gettimeofday() system call exists (to obtain a
767 sub-second accuracy clock). You should probably include <sys/resource.h>.
769 d_gnulibc (d_gnulibc.U):
770 Defined if we're dealing with the GNU C Library.
772 d_grpasswd (i_grp.U):
773 This variable conditionally defines GRPASSWD, which indicates
774 that struct group in <grp.h> contains gr_passwd.
776 d_hasmntopt (d_hasmntopt.U):
777 This variable conditionally defines the HAS_HASMNTOPT symbol, which
778 indicates to the C program that the hasmntopt() routine is available
779 to query the mount options of file systems.
782 This variable conditionally defines HAS_HTONL if htonl() and its
783 friends are available to do network order byte swapping.
786 This variable conditionally defines the HAS_ICONV symbol, which
787 indicates to the C program that the iconv() routine is available.
789 d_index (d_strchr.U):
790 This variable conditionally defines HAS_INDEX if index() and
791 rindex() are available for string searching.
793 d_inetaton (d_inetaton.U):
794 This variable conditionally defines the HAS_INET_ATON symbol, which
795 indicates to the C program that the inet_aton() function is available
796 to parse IP address "dotted-quad" strings.
798 d_int64t (d_int64t.U):
799 This symbol will be defined if the C compiler supports int64_t.
801 d_isascii (d_isascii.U):
802 This variable conditionally defines the HAS_ISASCII constant,
803 which indicates to the C program that isascii() is available.
805 d_killpg (d_killpg.U):
806 This variable conditionally defines the HAS_KILLPG symbol, which
807 indicates to the C program that the killpg() routine is available
808 to kill process groups.
810 d_lchown (d_lchown.U):
811 This variable conditionally defines the HAS_LCHOWN symbol, which
812 indicates to the C program that the lchown() routine is available
813 to operate on a symbolic link (instead of following the link).
815 d_ldbl_dig (d_ldbl_dig.U):
816 This variable conditionally defines d_ldbl_dig if this system's
817 header files provide LDBL_DIG, which is the number of significant
818 digits in a long double precision number.
821 This variable conditionally defines HAS_LINK if link() is
822 available to create hard links.
824 d_locconv (d_locconv.U):
825 This variable conditionally defines HAS_LOCALECONV if localeconv() is
826 available for numeric and monetary formatting conventions.
829 This variable conditionally defines HAS_LOCKF if lockf() is
830 available to do file locking.
832 d_longdbl (d_longdbl.U):
833 This variable conditionally defines HAS_LONG_DOUBLE if
834 the long double type is supported.
836 d_longlong (d_longlong.U):
837 This variable conditionally defines HAS_LONG_LONG if
838 the long long type is supported.
841 This variable conditionally defines HAS_LSTAT if lstat() is
842 available to do file stats on symbolic links.
845 This variable conditionally defines the HAS_MBLEN symbol, which
846 indicates to the C program that the mblen() routine is available
847 to find the number of bytes in a multibye character.
849 d_mbstowcs (d_mbstowcs.U):
850 This variable conditionally defines the HAS_MBSTOWCS symbol, which
851 indicates to the C program that the mbstowcs() routine is available
852 to convert a multibyte string into a wide character string.
854 d_mbtowc (d_mbtowc.U):
855 This variable conditionally defines the HAS_MBTOWC symbol, which
856 indicates to the C program that the mbtowc() routine is available
857 to convert multibyte to a wide character.
859 d_memchr (d_memchr.U):
860 This variable conditionally defines the HAS_MEMCHR symbol, which
861 indicates to the C program that the memchr() routine is available
862 to locate characters within a C string.
864 d_memcmp (d_memcmp.U):
865 This variable conditionally defines the HAS_MEMCMP symbol, which
866 indicates to the C program that the memcmp() routine is available
867 to compare blocks of memory.
869 d_memcpy (d_memcpy.U):
870 This variable conditionally defines the HAS_MEMCPY symbol, which
871 indicates to the C program that the memcpy() routine is available
872 to copy blocks of memory.
874 d_memmove (d_memmove.U):
875 This variable conditionally defines the HAS_MEMMOVE symbol, which
876 indicates to the C program that the memmove() routine is available
877 to copy potentatially overlapping blocks of memory.
879 d_memset (d_memset.U):
880 This variable conditionally defines the HAS_MEMSET symbol, which
881 indicates to the C program that the memset() routine is available
882 to set blocks of memory.
885 This variable conditionally defines the HAS_MKDIR symbol, which
886 indicates to the C program that the mkdir() routine is available
887 to create directories..
889 d_mkdtemp (d_mkdtemp.U):
890 This variable conditionally defines the HAS_MKDTEMP symbol, which
891 indicates to the C program that the mkdtemp() routine is available
892 to exclusively create a uniquely named temporary directory.
894 d_mkfifo (d_mkfifo.U):
895 This variable conditionally defines the HAS_MKFIFO symbol, which
896 indicates to the C program that the mkfifo() routine is available.
898 d_mkstemp (d_mkstemp.U):
899 This variable conditionally defines the HAS_MKSTEMP symbol, which
900 indicates to the C program that the mkstemp() routine is available
901 to exclusively create and open a uniquely named temporary file.
903 d_mkstemps (d_mkstemps.U):
904 This variable conditionally defines the HAS_MKSTEMPS symbol, which
905 indicates to the C program that the mkstemps() routine is available
906 to exclusively create and open a uniquely named (with a suffix)
909 d_mktime (d_mktime.U):
910 This variable conditionally defines the HAS_MKTIME symbol, which
911 indicates to the C program that the mktime() routine is available.
914 This variable conditionally defines HAS_MMAP if mmap() is
915 available to map a file into memory.
917 d_mprotect (d_mprotect.U):
918 This variable conditionally defines HAS_MPROTECT if mprotect() is
919 available to modify the access protection of a memory mapped file.
922 This variable conditionally defines the HAS_MSG symbol, which
923 indicates that the entire msg*(2) library is present.
925 d_msg_ctrunc (d_socket.U):
926 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
927 which indicates that the MSG_CTRUNC is available. #ifdef is
928 not enough because it may be an enum, glibc has been known to do this.
930 d_msg_dontroute (d_socket.U):
931 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
932 which indicates that the MSG_DONTROUTE is available. #ifdef is
933 not enough because it may be an enum, glibc has been known to do this.
935 d_msg_oob (d_socket.U):
936 This variable conditionally defines the HAS_MSG_OOB symbol,
937 which indicates that the MSG_OOB is available. #ifdef is
938 not enough because it may be an enum, glibc has been known to do this.
940 d_msg_peek (d_socket.U):
941 This variable conditionally defines the HAS_MSG_PEEK symbol,
942 which indicates that the MSG_PEEK is available. #ifdef is
943 not enough because it may be an enum, glibc has been known to do this.
945 d_msg_proxy (d_socket.U):
946 This variable conditionally defines the HAS_MSG_PROXY symbol,
947 which indicates that the MSG_PROXY is available. #ifdef is
948 not enough because it may be an enum, glibc has been known to do this.
950 d_msgctl (d_msgctl.U):
951 This variable conditionally defines the HAS_MSGCTL symbol, which
952 indicates to the C program that the msgctl() routine is available.
954 d_msgget (d_msgget.U):
955 This variable conditionally defines the HAS_MSGGET symbol, which
956 indicates to the C program that the msgget() routine is available.
958 d_msgrcv (d_msgrcv.U):
959 This variable conditionally defines the HAS_MSGRCV symbol, which
960 indicates to the C program that the msgrcv() routine is available.
962 d_msgsnd (d_msgsnd.U):
963 This variable conditionally defines the HAS_MSGSND symbol, which
964 indicates to the C program that the msgsnd() routine is available.
967 This variable conditionally defines HAS_MSYNC if msync() is
968 available to synchronize a mapped file.
970 d_munmap (d_munmap.U):
971 This variable conditionally defines HAS_MUNMAP if munmap() is
972 available to unmap a region mapped by mmap().
974 d_mymalloc (mallocsrc.U):
975 This variable conditionally defines MYMALLOC in case other parts
976 of the source want to take special action if MYMALLOC is used.
977 This may include different sorts of profiling or error detection.
980 This variable conditionally defines the HAS_NICE symbol, which
981 indicates to the C program that the nice() routine is available.
983 d_nv_preserves_uv (perlxv.U):
984 This variable indicates whether a variable of type nvtype
985 can preserve all the bits a variable of type uvtype.
988 This symbol will be defined if the C compiler supports off64_t.
990 d_old_pthread_create_joinable (d_pthrattrj.U):
991 This variable conditionally defines pthread_create_joinable.
992 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
994 d_oldpthreads (usethreads.U):
995 This variable conditionally defines the OLD_PTHREADS_API symbol,
996 and indicates that Perl should be built to use the old
997 draft POSIX threads API. This is only potentially meaningful if
1000 d_oldsock (d_socket.U):
1001 This variable conditionally defines the OLDSOCKET symbol, which
1002 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1004 d_open3 (d_open3.U):
1005 This variable conditionally defines the HAS_OPEN3 manifest constant,
1006 which indicates to the C program that the 3 argument version of
1007 the open(2) function is available.
1009 d_pathconf (d_pathconf.U):
1010 This variable conditionally defines the HAS_PATHCONF symbol, which
1011 indicates to the C program that the pathconf() routine is available
1012 to determine file-system related limits and options associated
1013 with a given filename.
1015 d_pause (d_pause.U):
1016 This variable conditionally defines the HAS_PAUSE symbol, which
1017 indicates to the C program that the pause() routine is available
1018 to suspend a process until a signal is received.
1020 d_phostname (d_gethname.U):
1021 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1022 contains the shell command which, when fed to popen(), may be
1023 used to derive the host name.
1026 This variable conditionally defines the HAS_PIPE symbol, which
1027 indicates to the C program that the pipe() routine is available
1028 to create an inter-process channel.
1031 This variable conditionally defines the HAS_POLL symbol, which
1032 indicates to the C program that the poll() routine is available
1033 to poll active file descriptors.
1035 d_portable (d_portable.U):
1036 This variable conditionally defines the PORTABLE symbol, which
1037 indicates to the C program that it should not assume that it is
1038 running on the machine it was compiled on.
1040 d_PRId64 (quadfio.U):
1041 This variable conditionally defines the PERL_PRId64 symbol, which
1042 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1044 d_PRIeldbl (longdblfio.U):
1045 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1046 indiciates that stdio has a symbol to print long doubles.
1048 d_PRIEldbl (longdblfio.U):
1049 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1050 indiciates that stdio has a symbol to print long doubles.
1052 d_PRIfldbl (longdblfio.U):
1053 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1054 indiciates that stdio has a symbol to print long doubles.
1056 d_PRIFldbl (longdblfio.U):
1057 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1058 indiciates that stdio has a symbol to print long doubles.
1060 d_PRIgldbl (longdblfio.U):
1061 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1062 indiciates that stdio has a symbol to print long doubles.
1064 d_PRIGldbl (longdblfio.U):
1065 This variable conditionally defines the PERL_PRIfldlbl symbol, which
1066 indiciates that stdio has a symbol to print long doubles.
1068 d_PRIi64 (quadfio.U):
1069 This variable conditionally defines the PERL_PRIi64 symbol, which
1070 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1072 d_PRIo64 (quadfio.U):
1073 This variable conditionally defines the PERL_PRIo64 symbol, which
1074 indiciates that stdio has a symbol to print 64-bit octal numbers.
1076 d_PRIu64 (quadfio.U):
1077 This variable conditionally defines the PERL_PRIu64 symbol, which
1078 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1081 d_PRIx64 (quadfio.U):
1082 This variable conditionally defines the PERL_PRIx64 symbol, which
1083 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
1085 d_PRIX64 (quadfio.U):
1086 This variable conditionally defines the PERL_PRIX64 symbol, which
1087 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
1089 d_pthread_yield (d_pthread_y.U):
1090 This variable conditionally defines the HAS_PTHREAD_YIELD
1091 symbol if the pthread_yield routine is available to yield
1092 the execution of the current thread.
1095 This variable conditionally defines PWAGE, which indicates
1096 that struct passwd contains pw_age.
1098 d_pwchange (i_pwd.U):
1099 This variable conditionally defines PWCHANGE, which indicates
1100 that struct passwd contains pw_change.
1102 d_pwclass (i_pwd.U):
1103 This variable conditionally defines PWCLASS, which indicates
1104 that struct passwd contains pw_class.
1106 d_pwcomment (i_pwd.U):
1107 This variable conditionally defines PWCOMMENT, which indicates
1108 that struct passwd contains pw_comment.
1110 d_pwexpire (i_pwd.U):
1111 This variable conditionally defines PWEXPIRE, which indicates
1112 that struct passwd contains pw_expire.
1114 d_pwgecos (i_pwd.U):
1115 This variable conditionally defines PWGECOS, which indicates
1116 that struct passwd contains pw_gecos.
1118 d_pwpasswd (i_pwd.U):
1119 This variable conditionally defines PWPASSWD, which indicates
1120 that struct passwd contains pw_passwd.
1122 d_pwquota (i_pwd.U):
1123 This variable conditionally defines PWQUOTA, which indicates
1124 that struct passwd contains pw_quota.
1126 d_quad (quadtype.U):
1127 This variable, if defined, tells that there's a 64-bit integer type,
1130 d_readdir (d_readdir.U):
1131 This variable conditionally defines HAS_READDIR if readdir() is
1132 available to read directory entries.
1134 d_readlink (d_readlink.U):
1135 This variable conditionally defines the HAS_READLINK symbol, which
1136 indicates to the C program that the readlink() routine is available
1137 to read the value of a symbolic link.
1139 d_rename (d_rename.U):
1140 This variable conditionally defines the HAS_RENAME symbol, which
1141 indicates to the C program that the rename() routine is available
1144 d_rewinddir (d_readdir.U):
1145 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1148 d_rmdir (d_rmdir.U):
1149 This variable conditionally defines HAS_RMDIR if rmdir() is
1150 available to remove directories.
1152 d_safebcpy (d_safebcpy.U):
1153 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1154 the bcopy() routine can do overlapping copies.
1156 d_safemcpy (d_safemcpy.U):
1157 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1158 the memcpy() routine can do overlapping copies.
1160 d_sanemcmp (d_sanemcmp.U):
1161 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1162 the memcpy() routine is available and can be used to compare relative
1163 magnitudes of chars with their high bits set.
1165 d_sched_yield (d_pthread_y.U):
1166 This variable conditionally defines the HAS_SCHED_YIELD
1167 symbol if the sched_yield routine is available to yield
1168 the execution of the current thread.
1170 d_scm_rights (d_socket.U):
1171 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1172 which indicates that the SCM_RIGHTS is available. #ifdef is
1173 not enough because it may be an enum, glibc has been known to do this.
1175 d_seekdir (d_readdir.U):
1176 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1179 d_select (d_select.U):
1180 This variable conditionally defines HAS_SELECT if select() is
1181 available to select active file descriptors. A <sys/time.h>
1182 inclusion may be necessary for the timeout field.
1185 This variable conditionally defines the HAS_SEM symbol, which
1186 indicates that the entire sem*(2) library is present.
1188 d_semctl (d_semctl.U):
1189 This variable conditionally defines the HAS_SEMCTL symbol, which
1190 indicates to the C program that the semctl() routine is available.
1192 d_semctl_semid_ds (d_union_semun.U):
1193 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1194 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1196 d_semctl_semun (d_union_semun.U):
1197 This variable conditionally defines USE_SEMCTL_SEMUN, which
1198 indicates that union semun is to be used for semctl IPC_STAT.
1200 d_semget (d_semget.U):
1201 This variable conditionally defines the HAS_SEMGET symbol, which
1202 indicates to the C program that the semget() routine is available.
1204 d_semop (d_semop.U):
1205 This variable conditionally defines the HAS_SEMOP symbol, which
1206 indicates to the C program that the semop() routine is available.
1208 d_setegid (d_setegid.U):
1209 This variable conditionally defines the HAS_SETEGID symbol, which
1210 indicates to the C program that the setegid() routine is available
1211 to change the effective gid of the current program.
1213 d_seteuid (d_seteuid.U):
1214 This variable conditionally defines the HAS_SETEUID symbol, which
1215 indicates to the C program that the seteuid() routine is available
1216 to change the effective uid of the current program.
1218 d_setgrent (d_setgrent.U):
1219 This variable conditionally defines the HAS_SETGRENT symbol, which
1220 indicates to the C program that the setgrent() routine is available
1221 for initializing sequential access to the group database.
1223 d_setgrps (d_setgrps.U):
1224 This variable conditionally defines the HAS_SETGROUPS symbol, which
1225 indicates to the C program that the setgroups() routine is available
1226 to set the list of process groups.
1228 d_sethent (d_sethent.U):
1229 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1232 d_setlinebuf (d_setlnbuf.U):
1233 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1234 indicates to the C program that the setlinebuf() routine is available
1235 to change stderr or stdout from block-buffered or unbuffered to a
1238 d_setlocale (d_setlocale.U):
1239 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1240 available to handle locale-specific ctype implementations.
1242 d_setnent (d_setnent.U):
1243 This variable conditionally defines HAS_SETNETENT if setnetent() is
1246 d_setpent (d_setpent.U):
1247 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1250 d_setpgid (d_setpgid.U):
1251 This variable conditionally defines the HAS_SETPGID symbol if the
1252 setpgid(pid, gpid) function is available to set process group ID.
1254 d_setpgrp2 (d_setpgrp2.U):
1255 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1256 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1257 is available to set the current process group.
1259 d_setpgrp (d_setpgrp.U):
1260 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1261 available to set the current process group.
1263 d_setprior (d_setprior.U):
1264 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1265 is available to set a process's priority.
1267 d_setpwent (d_setpwent.U):
1268 This variable conditionally defines the HAS_SETPWENT symbol, which
1269 indicates to the C program that the setpwent() routine is available
1270 for initializing sequential access to the passwd database.
1272 d_setregid (d_setregid.U):
1273 This variable conditionally defines HAS_SETREGID if setregid() is
1274 available to change the real and effective gid of the current
1277 d_setresgid (d_setregid.U):
1278 This variable conditionally defines HAS_SETRESGID if setresgid() is
1279 available to change the real, effective and saved gid of the current
1282 d_setresuid (d_setreuid.U):
1283 This variable conditionally defines HAS_SETREUID if setresuid() is
1284 available to change the real, effective and saved uid of the current
1287 d_setreuid (d_setreuid.U):
1288 This variable conditionally defines HAS_SETREUID if setreuid() is
1289 available to change the real and effective uid of the current
1292 d_setrgid (d_setrgid.U):
1293 This variable conditionally defines the HAS_SETRGID symbol, which
1294 indicates to the C program that the setrgid() routine is available
1295 to change the real gid of the current program.
1297 d_setruid (d_setruid.U):
1298 This variable conditionally defines the HAS_SETRUID symbol, which
1299 indicates to the C program that the setruid() routine is available
1300 to change the real uid of the current program.
1302 d_setsent (d_setsent.U):
1303 This variable conditionally defines HAS_SETSERVENT if setservent() is
1306 d_setsid (d_setsid.U):
1307 This variable conditionally defines HAS_SETSID if setsid() is
1308 available to set the process group ID.
1310 d_setspent (d_setspent.U):
1311 This variable conditionally defines HAS_SETSPENT if setspent() is
1312 available to initialize the scan of SysV shadow password entries.
1314 d_setvbuf (d_setvbuf.U):
1315 This variable conditionally defines the HAS_SETVBUF symbol, which
1316 indicates to the C program that the setvbuf() routine is available
1317 to change buffering on an open stdio stream.
1320 This variable conditionally defines the USE_SFIO symbol,
1321 and indicates whether sfio is available (and should be used).
1324 This variable conditionally defines the HAS_SHM symbol, which
1325 indicates that the entire shm*(2) library is present.
1327 d_shmat (d_shmat.U):
1328 This variable conditionally defines the HAS_SHMAT symbol, which
1329 indicates to the C program that the shmat() routine is available.
1331 d_shmatprototype (d_shmat.U):
1332 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1333 symbol, which indicates that sys/shm.h has a prototype for
1336 d_shmctl (d_shmctl.U):
1337 This variable conditionally defines the HAS_SHMCTL symbol, which
1338 indicates to the C program that the shmctl() routine is available.
1340 d_shmdt (d_shmdt.U):
1341 This variable conditionally defines the HAS_SHMDT symbol, which
1342 indicates to the C program that the shmdt() routine is available.
1344 d_shmget (d_shmget.U):
1345 This variable conditionally defines the HAS_SHMGET symbol, which
1346 indicates to the C program that the shmget() routine is available.
1348 d_sigaction (d_sigaction.U):
1349 This variable conditionally defines the HAS_SIGACTION symbol, which
1350 indicates that the Vr4 sigaction() routine is available.
1352 d_sigsetjmp (d_sigsetjmp.U):
1353 This variable conditionally defines the HAS_SIGSETJMP symbol,
1354 which indicates that the sigsetjmp() routine is available to
1355 call setjmp() and optionally save the process's signal mask.
1357 d_socket (d_socket.U):
1358 This variable conditionally defines HAS_SOCKET, which indicates
1359 that the BSD socket interface is supported.
1361 d_sockpair (d_socket.U):
1362 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1363 indicates that the BSD socketpair() is supported.
1365 d_sqrtl (d_sqrtl.U):
1366 This variable conditionally defines the HAS_SQRTL symbol, which
1367 indicates to the C program that the sqrtl() routine is available.
1369 d_statblks (d_statblks.U):
1370 This variable conditionally defines USE_STAT_BLOCKS
1371 if this system has a stat structure declaring
1372 st_blksize and st_blocks.
1374 d_statfs_f_flags (d_statfs_f_flags.U):
1375 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
1376 symbol, which indicates to struct statfs from has f_flags member.
1377 This kind of struct statfs is coming from sys/mount.h (BSD),
1378 not from sys/statfs.h (SYSV).
1380 d_statfs_s (d_statfs_s.U):
1381 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
1382 which indicates that the struct statfs is supported.
1384 d_statvfs (d_statvfs.U):
1385 This variable conditionally defines the HAS_STATVFS symbol, which
1386 indicates to the C program that the statvfs() routine is available.
1388 d_stdio_cnt_lval (d_stdstdio.U):
1389 This variable conditionally defines STDIO_CNT_LVALUE if the
1390 FILE_cnt macro can be used as an lvalue.
1392 d_stdio_ptr_lval (d_stdstdio.U):
1393 This variable conditionally defines STDIO_PTR_LVALUE if the
1394 FILE_ptr macro can be used as an lvalue.
1396 d_stdio_stream_array (stdio_streams.U):
1397 This variable tells whether there is an array holding
1400 d_stdiobase (d_stdstdio.U):
1401 This variable conditionally defines USE_STDIO_BASE if this system
1402 has a FILE structure declaring a usable _base field (or equivalent)
1405 d_stdstdio (d_stdstdio.U):
1406 This variable conditionally defines USE_STDIO_PTR if this system
1407 has a FILE structure declaring usable _ptr and _cnt fields (or
1408 equivalent) in stdio.h.
1410 d_strchr (d_strchr.U):
1411 This variable conditionally defines HAS_STRCHR if strchr() and
1412 strrchr() are available for string searching.
1414 d_strcoll (d_strcoll.U):
1415 This variable conditionally defines HAS_STRCOLL if strcoll() is
1416 available to compare strings using collating information.
1418 d_strctcpy (d_strctcpy.U):
1419 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1420 indicates to the C program that this C compiler knows how to copy
1423 d_strerrm (d_strerror.U):
1424 This variable holds what Strerrr is defined as to translate an error
1425 code condition into an error message string. It could be 'strerror'
1426 or a more complex macro emulating strrror with sys_errlist[], or the
1427 "unknown" string when both strerror and sys_errlist are missing.
1429 d_strerror (d_strerror.U):
1430 This variable conditionally defines HAS_STRERROR if strerror() is
1431 available to translate error numbers to strings.
1433 d_strtod (d_strtod.U):
1434 This variable conditionally defines the HAS_STRTOD symbol, which
1435 indicates to the C program that the strtod() routine is available
1436 to provide better numeric string conversion than atof().
1438 d_strtol (d_strtol.U):
1439 This variable conditionally defines the HAS_STRTOL symbol, which
1440 indicates to the C program that the strtol() routine is available
1441 to provide better numeric string conversion than atoi() and friends.
1443 d_strtold (d_strtold.U):
1444 This variable conditionally defines the HAS_STRTOLD symbol, which
1445 indicates to the C program that the strtold() routine is available.
1447 d_strtoll (d_strtoll.U):
1448 This variable conditionally defines the HAS_STRTOLL symbol, which
1449 indicates to the C program that the strtoll() routine is available.
1451 d_strtoul (d_strtoul.U):
1452 This variable conditionally defines the HAS_STRTOUL symbol, which
1453 indicates to the C program that the strtoul() routine is available
1454 to provide conversion of strings to unsigned long.
1456 d_strtoull (d_strtoull.U):
1457 This variable conditionally defines the HAS_STRTOULL symbol, which
1458 indicates to the C program that the strtoull() routine is available.
1460 d_strtouq (d_strtouq.U):
1461 This variable conditionally defines the HAS_STRTOUQ symbol, which
1462 indicates to the C program that the strtouq() routine is available.
1464 d_strxfrm (d_strxfrm.U):
1465 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1466 available to transform strings.
1468 d_suidsafe (d_dosuid.U):
1469 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1470 if setuid scripts can be secure. This test looks in /dev/fd/.
1472 d_symlink (d_symlink.U):
1473 This variable conditionally defines the HAS_SYMLINK symbol, which
1474 indicates to the C program that the symlink() routine is available
1475 to create symbolic links.
1477 d_syscall (d_syscall.U):
1478 This variable conditionally defines HAS_SYSCALL if syscall() is
1479 available call arbitrary system calls.
1481 d_sysconf (d_sysconf.U):
1482 This variable conditionally defines the HAS_SYSCONF symbol, which
1483 indicates to the C program that the sysconf() routine is available
1484 to determine system related limits and options.
1486 d_sysernlst (d_strerror.U):
1487 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1488 is available to translate error numbers to the symbolic name.
1490 d_syserrlst (d_strerror.U):
1491 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1492 available to translate error numbers to strings.
1494 d_system (d_system.U):
1495 This variable conditionally defines HAS_SYSTEM if system() is
1496 available to issue a shell command.
1498 d_tcgetpgrp (d_tcgtpgrp.U):
1499 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1500 indicates to the C program that the tcgetpgrp() routine is available.
1501 to get foreground process group ID.
1503 d_tcsetpgrp (d_tcstpgrp.U):
1504 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1505 indicates to the C program that the tcsetpgrp() routine is available
1506 to set foreground process group ID.
1508 d_telldir (d_readdir.U):
1509 This variable conditionally defines HAS_TELLDIR if telldir() is
1512 d_telldirproto (d_telldirproto.U):
1513 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1514 which indicates to the C program that the system provides
1515 a prototype for the telldir() function. Otherwise, it is
1516 up to the program to supply one.
1519 This variable conditionally defines the HAS_TIME symbol, which indicates
1520 that the time() routine exists. The time() routine is normaly
1521 provided on UNIX systems.
1523 d_times (d_times.U):
1524 This variable conditionally defines the HAS_TIMES symbol, which indicates
1525 that the times() routine exists. The times() routine is normaly
1526 provided on UNIX systems. You may have to include <sys/times.h>.
1528 d_truncate (d_truncate.U):
1529 This variable conditionally defines HAS_TRUNCATE if truncate() is
1530 available to truncate files.
1532 d_tzname (d_tzname.U):
1533 This variable conditionally defines HAS_TZNAME if tzname[] is
1534 available to access timezone names.
1536 d_umask (d_umask.U):
1537 This variable conditionally defines the HAS_UMASK symbol, which
1538 indicates to the C program that the umask() routine is available.
1539 to set and get the value of the file creation mask.
1541 d_uname (d_gethname.U):
1542 This variable conditionally defines the HAS_UNAME symbol, which
1543 indicates to the C program that the uname() routine may be
1544 used to derive the host name.
1546 d_union_semun (d_union_semun.U):
1547 This variable conditionally defines HAS_UNION_SEMUN if the
1548 union semun is defined by including <sys/sem.h>.
1550 d_ustat (d_ustat.U):
1551 This variable conditionally defines HAS_USTAT if ustat() is
1552 available to query file system statistics by dev_t.
1554 d_vendorbin (vendorbin.U):
1555 This variable conditionally defines PERL_VENDORBIN.
1557 d_vendorlib (vendorlib.U):
1558 This variable conditionally defines PERL_VENDORLIB.
1560 d_vfork (d_vfork.U):
1561 This variable conditionally defines the HAS_VFORK symbol, which
1562 indicates the vfork() routine is available.
1564 d_void_closedir (d_closedir.U):
1565 This variable conditionally defines VOID_CLOSEDIR if closedir()
1566 does not return a value.
1568 d_voidsig (d_voidsig.U):
1569 This variable conditionally defines VOIDSIG if this system
1570 declares "void (*signal(...))()" in signal.h. The old way was to
1571 declare it as "int (*signal(...))()".
1573 d_voidtty (i_sysioctl.U):
1574 This variable conditionally defines USE_IOCNOTTY to indicate that the
1575 ioctl() call with TIOCNOTTY should be used to void tty association.
1576 Otherwise (on USG probably), it is enough to close the standard file
1577 decriptors and do a setpgrp().
1579 d_volatile (d_volatile.U):
1580 This variable conditionally defines the HASVOLATILE symbol, which
1581 indicates to the C program that this C compiler knows about the
1582 volatile declaration.
1584 d_vprintf (d_vprintf.U):
1585 This variable conditionally defines the HAS_VPRINTF symbol, which
1586 indicates to the C program that the vprintf() routine is available
1587 to printf with a pointer to an argument list.
1589 d_wait4 (d_wait4.U):
1590 This variable conditionally defines the HAS_WAIT4 symbol, which
1591 indicates the wait4() routine is available.
1593 d_waitpid (d_waitpid.U):
1594 This variable conditionally defines HAS_WAITPID if waitpid() is
1595 available to wait for child process.
1597 d_wcstombs (d_wcstombs.U):
1598 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1599 indicates to the C program that the wcstombs() routine is available
1600 to convert wide character strings to multibyte strings.
1602 d_wctomb (d_wctomb.U):
1603 This variable conditionally defines the HAS_WCTOMB symbol, which
1604 indicates to the C program that the wctomb() routine is available
1605 to convert a wide character to a multibyte.
1608 This variable conditionally defines the symbol XENIX, which alerts
1609 the C program that it runs under Xenix.
1612 This variable is used internally by Configure to determine the
1613 full pathname (if any) of the date program. After Configure runs,
1614 the value is reset to a plain "date" and is not useful.
1616 db_hashtype (i_db.U):
1617 This variable contains the type of the hash structure element
1618 in the <db.h> header file. In older versions of DB, it was
1619 int, while in newer ones it is u_int32_t.
1621 db_prefixtype (i_db.U):
1622 This variable contains the type of the prefix structure element
1623 in the <db.h> header file. In older versions of DB, it was
1624 int, while in newer ones it is size_t.
1626 defvoidused (voidflags.U):
1627 This variable contains the default value of the VOIDUSED symbol (15).
1629 direntrytype (i_dirent.U):
1630 This symbol is set to 'struct direct' or 'struct dirent' depending on
1631 whether dirent is available or not. You should use this pseudo type to
1632 portably declare your directory entries.
1635 This variable contains the extension that is to be used for the
1636 dynamically loaded modules that perl generaties.
1639 This variable contains the name of the dynamic loading file that
1640 will be used with the package.
1642 doublesize (doublesize.U):
1643 This variable contains the value of the DOUBLESIZE symbol, which
1644 indicates to the C program how many bytes there are in a double.
1646 drand01 (randfunc.U):
1647 Indicates the macro to be used to generate normalized
1648 random numbers. Uses randfunc, often divided by
1649 (double) (((unsigned long) 1 << randbits)) in order to
1650 normalize the result.
1651 In C programs, the macro 'Drand01' is mapped to drand01.
1653 dynamic_ext (Extensions.U):
1654 This variable holds a list of XS extension files we want to
1655 link dynamically into the package. It is used by Makefile.
1657 eagain (nblock_io.U):
1658 This variable bears the symbolic errno code set by read() when no
1659 data is present on the file and non-blocking I/O was enabled (otherwise,
1660 read() blocks naturally).
1663 This variable conditionally defines EBCDIC if this
1664 system uses EBCDIC encoding. Among other things, this
1665 means that the character ranges are not contiguous.
1669 This variable is used internally by Configure to determine the
1670 full pathname (if any) of the echo program. After Configure runs,
1671 the value is reset to a plain "echo" and is not useful.
1674 This variable is used internally by Configure to determine the
1675 full pathname (if any) of the egrep program. After Configure runs,
1676 the value is reset to a plain "egrep" and is not useful.
1679 This variable is defined but not used by Configure.
1680 The value is a plain '' and is not useful.
1683 When running under Eunice this variable contains a command which will
1684 convert a shell script to the proper form of text file for it to be
1685 executable by the shell. On other systems it is a no-op.
1688 This is an old synonym for _exe.
1691 This variable is used internally by Configure to determine the
1692 full pathname (if any) of the expr program. After Configure runs,
1693 the value is reset to a plain "expr" and is not useful.
1695 extensions (Extensions.U):
1696 This variable holds a list of all extension files (both XS and
1697 non-xs linked into the package. It is propagated to Config.pm
1698 and is typically used to test whether a particular extesion
1701 fflushall (fflushall.U):
1702 This symbol, if defined, tells that to flush
1703 all pending stdio output one must loop through all
1704 the stdio file handles stored in an array and fflush them.
1705 Note that if fflushNULL is defined, fflushall will not
1706 even be probed for and will be left undefined.
1708 fflushNULL (fflushall.U):
1709 This symbol, if defined, tells that fflush(NULL) does flush
1710 all pending stdio output.
1713 This variable is defined but not used by Configure.
1714 The value is a plain '' and is not useful.
1716 firstmakefile (Unix.U):
1717 This variable defines the first file searched by make. On unix,
1718 it is makefile (then Makefile). On case-insensitive systems,
1719 it might be something else. This is only used to deal with
1720 convoluted make depend tricks.
1723 This variable is defined but not used by Configure.
1724 The value is a plain '' and is not useful.
1726 fpossize (fpossize.U):
1727 This variable contains the size of a fpostype in bytes.
1729 fpostype (fpostype.U):
1730 This variable defines Fpos_t to be something like fpos_t, long,
1731 uint, or whatever type is used to declare file positions in libc.
1733 freetype (mallocsrc.U):
1734 This variable contains the return type of free(). It is usually
1735 void, but occasionally int.
1738 This variable contains the full pathname to 'ar', whether or
1739 not the user has specified 'portability'. This is only used
1743 This variable contains the full pathname to 'csh', whether or
1744 not the user has specified 'portability'. This is only used
1745 in the compiled C program, and we assume that all systems which
1746 can share this executable will have the same full pathname to
1749 full_sed (Loc_sed.U):
1750 This variable contains the full pathname to 'sed', whether or
1751 not the user has specified 'portability'. This is only used
1752 in the compiled C program, and we assume that all systems which
1753 can share this executable will have the same full pathname to
1757 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1758 indicate whether the compiler is version 1 or 2. This is used in
1759 setting some of the default cflags. It is set to '' if not gcc.
1762 This variable contains the format string used for printing a Gid_t.
1764 gidsign (gidsign.U):
1765 This variable contains the signedness of a gidtype.
1766 1 for unsigned, -1 for signed.
1768 gidsize (gidsize.U):
1769 This variable contains the size of a gidtype in bytes.
1771 gidtype (gidtype.U):
1772 This variable defines Gid_t to be something like gid_t, int,
1773 ushort, or whatever type is used to declare the return type
1774 of getgid(). Typically, it is the type of group ids in the kernel.
1777 This variable holds the general path (space-separated) used to
1778 find libraries. It may contain directories that do not exist on
1779 this platform, libpth is the cleaned-up version.
1782 This variable is used internally by Configure to determine the
1783 full pathname (if any) of the grep program. After Configure runs,
1784 the value is reset to a plain "grep" and is not useful.
1787 This variable contains a command that produces the text of the
1788 /etc/group file. This is normally "cat /etc/group", but can be
1789 "ypcat group" when NIS is used.
1790 On some systems, such as os390, there may be no equivalent
1791 command, in which case this variable is unset.
1793 groupstype (groupstype.U):
1794 This variable defines Groups_t to be something like gid_t, int,
1795 ushort, or whatever type is used for the second argument to
1796 getgroups() and setgroups(). Usually, this is the same as
1797 gidtype (gid_t), but sometimes it isn't.
1800 This variable is used internally by Configure to determine the
1801 full pathname (if any) of the gzip program. After Configure runs,
1802 the value is reset to a plain "gzip" and is not useful.
1804 h_fcntl (h_fcntl.U):
1805 This is variable gets set in various places to tell i_fcntl that
1806 <fcntl.h> should be included.
1808 h_sysfile (h_sysfile.U):
1809 This is variable gets set in various places to tell i_sys_file that
1810 <sys/file.h> should be included.
1813 Gives the type of hints used for previous answers. May be one of
1814 "default", "recommended" or "previous".
1817 This variable contains a command that produces the text of the
1818 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1819 "ypcat hosts" when NIS is used.
1820 On some systems, such as os390, there may be no equivalent
1821 command, in which case this variable is unset.
1824 This variable contains a flag which will tell the C compiler and loader
1825 to produce a program running with a huge memory model. If the
1826 huge model is not supported, contains the flag to produce large
1827 model programs. It is up to the Makefile to use this.
1830 This variable is the size of an I16 in bytes.
1833 This variable contains the C type used for Perl's I16.
1836 This variable is the size of an I32 in bytes.
1839 This variable contains the C type used for Perl's I32.
1842 This variable is the size of an I64 in bytes.
1845 This variable contains the C type used for Perl's I64.
1848 This variable is the size of an I8 in bytes.
1851 This variable contains the C type used for Perl's I8.
1853 i_arpainet (i_arpainet.U):
1854 This variable conditionally defines the I_ARPA_INET symbol,
1855 and indicates whether a C program should include <arpa/inet.h>.
1857 i_bsdioctl (i_sysioctl.U):
1858 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1859 indicates to the C program that <sys/bsdioctl.h> exists and should
1863 This variable conditionally defines the I_DB symbol, and indicates
1864 whether a C program may include Berkeley's DB include file <db.h>.
1867 This variable conditionally defines the I_DBM symbol, which
1868 indicates to the C program that <dbm.h> exists and should
1871 i_dirent (i_dirent.U):
1872 This variable conditionally defines I_DIRENT, which indicates
1873 to the C program that it should include <dirent.h>.
1876 This variable conditionally defines the I_DLD symbol, which
1877 indicates to the C program that <dld.h> (GNU dynamic loading)
1878 exists and should be included.
1880 i_dlfcn (i_dlfcn.U):
1881 This variable conditionally defines the I_DLFCN symbol, which
1882 indicates to the C program that <dlfcn.h> exists and should
1885 i_fcntl (i_fcntl.U):
1886 This variable controls the value of I_FCNTL (which tells
1887 the C program to include <fcntl.h>).
1889 i_float (i_float.U):
1890 This variable conditionally defines the I_FLOAT symbol, and indicates
1891 whether a C program may include <float.h> to get symbols like DBL_MAX
1892 or DBL_MIN, i.e. machine dependent floating point values.
1895 This variable conditionally defines the I_GDBM symbol, which
1896 indicates to the C program that <gdbm.h> exists and should
1900 This variable conditionally defines the I_GRP symbol, and indicates
1901 whether a C program should include <grp.h>.
1903 i_iconv (i_iconv.U):
1904 This variable conditionally defines the I_ICONV symbol, and indicates
1905 whether a C program should include <iconv.h>.
1907 i_inttypes (i_inttypes.U):
1908 This variable conditionally defines the I_INTTYPES symbol,
1909 and indicates whether a C program should include <inttypes.h>.
1911 i_limits (i_limits.U):
1912 This variable conditionally defines the I_LIMITS symbol, and indicates
1913 whether a C program may include <limits.h> to get symbols like WORD_BIT
1916 i_locale (i_locale.U):
1917 This variable conditionally defines the I_LOCALE symbol,
1918 and indicates whether a C program should include <locale.h>.
1920 i_machcthr (i_machcthr.U):
1921 This variable conditionally defines the I_MACH_CTHREADS symbol,
1922 and indicates whether a C program should include <mach/cthreads.h>.
1924 i_malloc (i_malloc.U):
1925 This variable conditionally defines the I_MALLOC symbol, and indicates
1926 whether a C program should include <malloc.h>.
1929 This variable conditionally defines the I_MATH symbol, and indicates
1930 whether a C program may include <math.h>.
1932 i_memory (i_memory.U):
1933 This variable conditionally defines the I_MEMORY symbol, and indicates
1934 whether a C program should include <memory.h>.
1936 i_mntent (i_mntent.U):
1937 This variable conditionally defines the I_MNTENT symbol, and indicates
1938 whether a C program should include <mntent.h>.
1941 This variable conditionally defines the I_NDBM symbol, which
1942 indicates to the C program that <ndbm.h> exists and should
1945 i_netdb (i_netdb.U):
1946 This variable conditionally defines the I_NETDB symbol, and indicates
1947 whether a C program should include <netdb.h>.
1949 i_neterrno (i_neterrno.U):
1950 This variable conditionally defines the I_NET_ERRNO symbol, which
1951 indicates to the C program that <net/errno.h> exists and should
1954 i_netinettcp (i_netinettcp.U):
1955 This variable conditionally defines the I_NETINET_TCP symbol,
1956 and indicates whether a C program should include <netinet/tcp.h>.
1959 This variable conditionally defines I_NETINET_IN, which indicates
1960 to the C program that it should include <netinet/in.h>. Otherwise,
1961 you may try <sys/in.h>.
1964 This variable conditionally defines the I_POLL symbol, and indicates
1965 whether a C program should include <poll.h>.
1967 i_pthread (i_pthread.U):
1968 This variable conditionally defines the I_PTHREAD symbol,
1969 and indicates whether a C program should include <pthread.h>.
1972 This variable conditionally defines I_PWD, which indicates
1973 to the C program that it should include <pwd.h>.
1975 i_rpcsvcdbm (i_dbm.U):
1976 This variable conditionally defines the I_RPCSVC_DBM symbol, which
1977 indicates to the C program that <rpcsvc/dbm.h> exists and should
1978 be included. Some System V systems might need this instead of <dbm.h>.
1981 This variable conditionally defines the I_SFIO symbol,
1982 and indicates whether a C program should include <sfio.h>.
1984 i_sgtty (i_termio.U):
1985 This variable conditionally defines the I_SGTTY symbol, which
1986 indicates to the C program that it should include <sgtty.h> rather
1989 i_shadow (i_shadow.U):
1990 This variable conditionally defines the I_SHADOW symbol, and indicates
1991 whether a C program should include <shadow.h>.
1993 i_socks (i_socks.U):
1994 This variable conditionally defines the I_SOCKS symbol, and indicates
1995 whether a C program should include <socks.h>.
1997 i_stdarg (i_varhdr.U):
1998 This variable conditionally defines the I_STDARG symbol, which
1999 indicates to the C program that <stdarg.h> exists and should
2002 i_stddef (i_stddef.U):
2003 This variable conditionally defines the I_STDDEF symbol, which
2004 indicates to the C program that <stddef.h> exists and should
2007 i_stdlib (i_stdlib.U):
2008 This variable conditionally defines the I_STDLIB symbol, which
2009 indicates to the C program that <stdlib.h> exists and should
2012 i_string (i_string.U):
2013 This variable conditionally defines the I_STRING symbol, which
2014 indicates that <string.h> should be included rather than <strings.h>.
2016 i_sysaccess (i_sysaccess.U):
2017 This variable conditionally defines the I_SYS_ACCESS symbol,
2018 and indicates whether a C program should include <sys/access.h>.
2020 i_sysdir (i_sysdir.U):
2021 This variable conditionally defines the I_SYS_DIR symbol, and indicates
2022 whether a C program should include <sys/dir.h>.
2024 i_sysfile (i_sysfile.U):
2025 This variable conditionally defines the I_SYS_FILE symbol, and indicates
2026 whether a C program should include <sys/file.h> to get R_OK and friends.
2028 i_sysfilio (i_sysioctl.U):
2029 This variable conditionally defines the I_SYS_FILIO symbol, which
2030 indicates to the C program that <sys/filio.h> exists and should
2031 be included in preference to <sys/ioctl.h>.
2034 This variable conditionally defines I_SYS_IN, which indicates
2035 to the C program that it should include <sys/in.h> instead of
2038 i_sysioctl (i_sysioctl.U):
2039 This variable conditionally defines the I_SYS_IOCTL symbol, which
2040 indicates to the C program that <sys/ioctl.h> exists and should
2043 i_syslog (i_syslog.U):
2044 This variable conditionally defines the I_SYSLOG symbol,
2045 and indicates whether a C program should include <syslog.h>.
2047 i_sysmman (i_sysmman.U):
2048 This variable conditionally defines the I_SYS_MMAN symbol, and
2049 indicates whether a C program should include <sys/mman.h>.
2051 i_sysmount (i_sysmount.U):
2052 This variable conditionally defines the I_SYSMOUNT symbol,
2053 and indicates whether a C program should include <sys/mount.h>.
2055 i_sysndir (i_sysndir.U):
2056 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
2057 whether a C program should include <sys/ndir.h>.
2059 i_sysparam (i_sysparam.U):
2060 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
2061 whether a C program should include <sys/param.h>.
2063 i_sysresrc (i_sysresrc.U):
2064 This variable conditionally defines the I_SYS_RESOURCE symbol,
2065 and indicates whether a C program should include <sys/resource.h>.
2067 i_syssecrt (i_syssecrt.U):
2068 This variable conditionally defines the I_SYS_SECURITY symbol,
2069 and indicates whether a C program should include <sys/security.h>.
2071 i_sysselct (i_sysselct.U):
2072 This variable conditionally defines I_SYS_SELECT, which indicates
2073 to the C program that it should include <sys/select.h> in order to
2074 get the definition of struct timeval.
2076 i_syssockio (i_sysioctl.U):
2077 This variable conditionally defines I_SYS_SOCKIO to indicate to the
2078 C program that socket ioctl codes may be found in <sys/sockio.h>
2079 instead of <sys/ioctl.h>.
2081 i_sysstat (i_sysstat.U):
2082 This variable conditionally defines the I_SYS_STAT symbol,
2083 and indicates whether a C program should include <sys/stat.h>.
2085 i_sysstatfs (i_sysstatfs.U):
2086 This variable conditionally defines the I_SYSSTATFS symbol,
2087 and indicates whether a C program should include <sys/statfs.h>.
2089 i_sysstatvfs (i_sysstatvfs.U):
2090 This variable conditionally defines the I_SYSSTATVFS symbol,
2091 and indicates whether a C program should include <sys/statvfs.h>.
2093 i_systime (i_time.U):
2094 This variable conditionally defines I_SYS_TIME, which indicates
2095 to the C program that it should include <sys/time.h>.
2097 i_systimek (i_time.U):
2098 This variable conditionally defines I_SYS_TIME_KERNEL, which
2099 indicates to the C program that it should include <sys/time.h>
2100 with KERNEL defined.
2102 i_systimes (i_systimes.U):
2103 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
2104 whether a C program should include <sys/times.h>.
2106 i_systypes (i_systypes.U):
2107 This variable conditionally defines the I_SYS_TYPES symbol,
2108 and indicates whether a C program should include <sys/types.h>.
2110 i_sysuio (i_sysuio.U):
2111 This variable conditionally defines the I_SYSUIO symbol, and indicates
2112 whether a C program should include <sys/uio.h>.
2114 i_sysun (i_sysun.U):
2115 This variable conditionally defines I_SYS_UN, which indicates
2116 to the C program that it should include <sys/un.h> to get UNIX
2117 domain socket definitions.
2119 i_sysvfs (i_sysvfs.U):
2120 This variable conditionally defines the I_SYSVFS symbol,
2121 and indicates whether a C program should include <sys/vfs.h>.
2123 i_syswait (i_syswait.U):
2124 This variable conditionally defines I_SYS_WAIT, which indicates
2125 to the C program that it should include <sys/wait.h>.
2127 i_termio (i_termio.U):
2128 This variable conditionally defines the I_TERMIO symbol, which
2129 indicates to the C program that it should include <termio.h> rather
2132 i_termios (i_termio.U):
2133 This variable conditionally defines the I_TERMIOS symbol, which
2134 indicates to the C program that the POSIX <termios.h> file is
2138 This variable conditionally defines I_TIME, which indicates
2139 to the C program that it should include <time.h>.
2141 i_unistd (i_unistd.U):
2142 This variable conditionally defines the I_UNISTD symbol, and indicates
2143 whether a C program should include <unistd.h>.
2145 i_ustat (i_ustat.U):
2146 This variable conditionally defines the I_USTAT symbol, and indicates
2147 whether a C program should include <ustat.h>.
2149 i_utime (i_utime.U):
2150 This variable conditionally defines the I_UTIME symbol, and indicates
2151 whether a C program should include <utime.h>.
2153 i_values (i_values.U):
2154 This variable conditionally defines the I_VALUES symbol, and indicates
2155 whether a C program may include <values.h> to get symbols like MAXLONG
2158 i_varargs (i_varhdr.U):
2159 This variable conditionally defines I_VARARGS, which indicates
2160 to the C program that it should include <varargs.h>.
2162 i_varhdr (i_varhdr.U):
2163 Contains the name of the header to be included to get va_dcl definition.
2164 Typically one of varargs.h or stdarg.h.
2166 i_vfork (i_vfork.U):
2167 This variable conditionally defines the I_VFORK symbol, and indicates
2168 whether a C program should include vfork.h.
2170 ignore_versioned_solibs (libs.U):
2171 This variable should be non-empty if non-versioned shared
2172 libraries (libfoo.so.x.y) are to be ignored (because they
2173 cannot be linked against).
2175 inc_version_list (inc_version_list.U):
2176 This variable specifies the list of subdirectories in over
2177 which perl.c:incpush() and lib/lib.pm will automatically
2178 search when adding directories to @INC. The elements in
2179 the list are separated by spaces. This is only useful
2180 if you have a perl library directory tree structured like the
2181 default one. See INSTALL for how this works. The versioned
2182 site_perl directory was introduced in 5.005, so that is the
2183 lowest possible value.
2185 inc_version_list_init (inc_version_list.U):
2186 This variable holds the same list as inc_version_list, but
2187 each item is enclosed in double quotes and separated by commas,
2188 suitable for use in the PERL_INC_VERSION_LIST initialization.
2191 This variable must preceed the normal include path to get hte
2192 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2193 Value can be "" or "/bsd43" on mips.
2196 This variable is defined but not used by Configure.
2197 The value is a plain '' and is not useful.
2199 installarchlib (archlib.U):
2200 This variable is really the same as archlibexp but may differ on
2201 those systems using AFS. For extra portability, only this variable
2202 should be used in makefiles.
2205 This variable is the same as binexp unless AFS is running in which case
2206 the user is explicitely prompted for it. This variable should always
2207 be used in your makefiles for maximum portability.
2209 installman1dir (man1dir.U):
2210 This variable is really the same as man1direxp, unless you are using
2211 AFS in which case it points to the read/write location whereas
2212 man1direxp only points to the read-only access location. For extra
2213 portability, you should only use this variable within your makefiles.
2215 installman3dir (man3dir.U):
2216 This variable is really the same as man3direxp, unless you are using
2217 AFS in which case it points to the read/write location whereas
2218 man3direxp only points to the read-only access location. For extra
2219 portability, you should only use this variable within your makefiles.
2221 installprefix (installprefix.U):
2222 This variable holds the name of the directory below which
2223 "make install" will install the package. For most users, this
2224 is the same as prefix. However, it is useful for
2225 installing the software into a different (usually temporary)
2226 location after which it can be bundled up and moved somehow
2227 to the final location specified by prefix.
2229 installprefixexp (installprefix.U):
2230 This variable holds the full absolute path of installprefix
2231 with all ~-expansion done.
2233 installprivlib (privlib.U):
2234 This variable is really the same as privlibexp but may differ on
2235 those systems using AFS. For extra portability, only this variable
2236 should be used in makefiles.
2238 installscript (scriptdir.U):
2239 This variable is usually the same as scriptdirexp, unless you are on
2240 a system running AFS, in which case they may differ slightly. You
2241 should always use this variable within your makefiles for portability.
2243 installsitearch (sitearch.U):
2244 This variable is really the same as sitearchexp but may differ on
2245 those systems using AFS. For extra portability, only this variable
2246 should be used in makefiles.
2248 installsitebin (sitebin.U):
2249 This variable is usually the same as sitebinexp, unless you are on
2250 a system running AFS, in which case they may differ slightly. You
2251 should always use this variable within your makefiles for portability.
2253 installsitelib (sitelib.U):
2254 This variable is really the same as sitelibexp but may differ on
2255 those systems using AFS. For extra portability, only this variable
2256 should be used in makefiles.
2258 installstyle (installstyle.U):
2259 This variable describes the "style" of the perl installation.
2260 This is intended to be useful for tools that need to
2261 manipulate entire perl distributions. Perl itself doesn't use
2262 this to find its libraries -- the library directories are
2263 stored directly in Config.pm. Currently, there are only two
2264 styles: "lib" and "lib/perl5". The default library locations
2265 (e.g. privlib, sitelib) are either $prefix/lib or
2266 $prefix/lib/perl5. The former is useful if $prefix is a
2267 directory dedicated to perl (e.g. /opt/perl), while the latter
2268 is useful if $prefix is shared by many packages, e.g. if
2270 This may later be extended to include other information, so
2271 be careful with pattern-matching on the results.
2272 For compatibility with perl5.005 and earlier, the default
2273 setting is based on whether or not $prefix contains the string
2276 installusrbinperl (instubperl.U):
2277 This variable tells whether Perl should be installed also as
2278 /usr/bin/perl in addition to
2281 installvendorbin (vendorbin.U):
2282 This variable is really the same as vendorbinexp but may differ on
2283 those systems using AFS. For extra portability, only this variable
2284 should be used in makefiles.
2286 installvendorlib (vendorlib.U):
2287 This variable is really the same as vendorlibexp but may differ on
2288 those systems using AFS. For extra portability, only this variable
2289 should be used in makefiles.
2291 intsize (intsize.U):
2292 This variable contains the value of the INTSIZE symbol, which
2293 indicates to the C program how many bytes there are in an int.
2295 ivdformat (perlxvf.U):
2296 This variable contains the format string used for printing
2297 a Perl IV as a signed decimal integer.
2300 This variable is the size of an IV in bytes.
2303 This variable contains the C type used for Perl's IV.
2305 known_extensions (Extensions.U):
2306 This variable holds a list of all XS extensions included in
2310 This variable is defined but not used by Configure.
2311 The value is a plain '' and is not useful.
2314 This variable contains a flag which will tell the C compiler and loader
2315 to produce a program running with a large memory model. It is up to
2316 the Makefile to use this.
2319 This variable indicates the program to be used to link
2320 libraries for dynamic loading. On some systems, it is 'ld'.
2321 On ELF systems, it should be $cc. Mostly, we'll try to respect
2322 the hint file setting.
2324 lddlflags (dlsrc.U):
2325 This variable contains any special flags that might need to be
2326 passed to $ld to create a shared library suitable for dynamic
2327 loading. It is up to the makefile to use it. For hpux, it
2328 should be '-b'. For sunos 4.1, it is empty.
2330 ldflags (ccflags.U):
2331 This variable contains any additional C loader flags desired by
2332 the user. It is up to the Makefile to use this.
2334 ldlibpthname (libperl.U):
2335 This variable holds the name of the shared library
2336 search path, often LD_LIBRARY_PATH. To get an empty
2337 string, the hints file must set this to 'none'.
2340 This variable is used internally by Configure to determine the
2341 full pathname (if any) of the less program. After Configure runs,
2342 the value is reset to a plain "less" and is not useful.
2345 This is an old synonym for _a.
2348 This variable contains the location of the C library.
2350 libperl (libperl.U):
2351 The perl executable is obtained by linking perlmain.c with
2352 libperl, any static extensions (usually just DynaLoader),
2353 and any other libraries needed on this system. libperl
2354 is usually libperl.a, but can also be libperl.so.xxx if
2355 the user wishes to build a perl executable with a shared
2359 This variable holds the general path (space-separated) used to find
2360 libraries. It is intended to be used by other units.
2363 This variable holds the additional libraries we want to use.
2364 It is up to the Makefile to deal with it.
2367 This variable holds the directory names aka dirnames of the libraries
2368 we found and accepted, duplicates are removed.
2371 This variable holds the filenames aka basenames of the libraries
2372 we found and accepted.
2375 This variable holds the full pathnames of the libraries
2376 we found and accepted.
2378 libswanted (Myinit.U):
2379 This variable holds a list of all the libraries we want to
2380 search. The order is chosen to pick up the c library
2381 ahead of ucb or bsd libraries for SVR4.
2384 This variable is defined but not used by Configure.
2385 The value is a plain '' and is not useful.
2388 This variable is defined but not used by Configure.
2389 The value is a plain '' and is not useful.
2391 lkflags (ccflags.U):
2392 This variable contains any additional C partial linker flags desired by
2393 the user. It is up to the Makefile to use this.
2396 This variable is used internally by Configure to determine the
2397 full pathname (if any) of the ln program. After Configure runs,
2398 the value is reset to a plain "ln" and is not useful.
2401 This variable holds the name of the command to make
2402 symbolic links (if they are supported). It can be used
2403 in the Makefile. It is either 'ln -s' or 'ln'
2405 locincpth (ccflags.U):
2406 This variable contains a list of additional directories to be
2407 searched by the compiler. The appropriate '-I' directives will
2408 be added to ccflags. This is intended to simplify setting
2409 local directories from the Configure command line.
2410 It's not much, but it parallels the loclibpth stuff in libpth.U.
2412 loclibpth (libpth.U):
2413 This variable holds the paths (space-separated) used to find local
2414 libraries. It is prepended to libpth, and is intended to be easily
2415 set from the command line.
2417 longdblsize (d_longdbl.U):
2418 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2419 indicates to the C program how many bytes there are in a long double,
2420 if this system supports long doubles.
2422 longlongsize (d_longlong.U):
2423 This variable contains the value of the LONGLONGSIZE symbol, which
2424 indicates to the C program how many bytes there are in a long long,
2425 if this system supports long long.
2427 longsize (intsize.U):
2428 This variable contains the value of the LONGSIZE symbol, which
2429 indicates to the C program how many bytes there are in a long.
2432 This variable is defined but not used by Configure.
2433 The value is a plain '' and is not useful.
2436 This variable is defined but not used by Configure.
2437 The value is a plain '' and is not useful.
2440 This variable is used internally by Configure to determine the
2441 full pathname (if any) of the ls program. After Configure runs,
2442 the value is reset to a plain "ls" and is not useful.
2444 lseeksize (lseektype.U):
2445 This variable defines lseektype to be something like off_t, long,
2446 or whatever type is used to declare lseek offset's type in the
2447 kernel (which also appears to be lseek's return type).
2449 lseektype (lseektype.U):
2450 This variable defines lseektype to be something like off_t, long,
2451 or whatever type is used to declare lseek offset's type in the
2452 kernel (which also appears to be lseek's return type).
2455 This variable is defined but not used by Configure.
2456 The value is a plain '' and is not useful.
2459 This variable is defined but not used by Configure.
2460 The value is a plain '' and is not useful.
2463 This variable is used internally by Configure to determine the
2464 full pathname (if any) of the make program. After Configure runs,
2465 the value is reset to a plain "make" and is not useful.
2467 make_set_make (make.U):
2468 Some versions of 'make' set the variable MAKE. Others do not.
2469 This variable contains the string to be included in Makefile.SH
2470 so that MAKE is set if needed, and not if not needed.
2471 Possible values are:
2472 make_set_make='#' # If your make program handles this for you,
2473 make_set_make="MAKE=$make" # if it doesn't.
2474 I used a comment character so that we can distinguish a
2475 'set' value (from a previous config.sh or Configure '-D' option)
2476 from an uncomputed value.
2478 mallocobj (mallocsrc.U):
2479 This variable contains the name of the malloc.o that this package
2480 generates, if that malloc.o is preferred over the system malloc.
2481 Otherwise the value is null. This variable is intended for generating
2482 Makefiles. See mallocsrc.
2484 mallocsrc (mallocsrc.U):
2485 This variable contains the name of the malloc.c that comes with
2486 the package, if that malloc.c is preferred over the system malloc.
2487 Otherwise the value is null. This variable is intended for generating
2490 malloctype (mallocsrc.U):
2491 This variable contains the kind of ptr returned by malloc and realloc.
2493 man1dir (man1dir.U):
2494 This variable contains the name of the directory in which manual
2495 source pages are to be put. It is the responsibility of the
2496 Makefile.SH to get the value of this into the proper command.
2497 You must be prepared to do the ~name expansion yourself.
2499 man1direxp (man1dir.U):
2500 This variable is the same as the man1dir variable, but is filename
2501 expanded at configuration time, for convenient use in makefiles.
2503 man1ext (man1dir.U):
2504 This variable contains the extension that the manual page should
2505 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2508 man3dir (man3dir.U):
2509 This variable contains the name of the directory in which manual
2510 source pages are to be put. It is the responsibility of the
2511 Makefile.SH to get the value of this into the proper command.
2512 You must be prepared to do the ~name expansion yourself.
2514 man3direxp (man3dir.U):
2515 This variable is the same as the man3dir variable, but is filename
2516 expanded at configuration time, for convenient use in makefiles.
2518 man3ext (man3dir.U):
2519 This variable contains the extension that the manual page should
2520 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2524 This variable is used internally by Configure to determine the
2525 full pathname (if any) of the Mcc program. After Configure runs,
2526 the value is reset to a plain "Mcc" and is not useful.
2529 This variable contains a flag which will tell the C compiler and loader
2530 to produce a program running with a medium memory model. If the
2531 medium model is not supported, contains the flag to produce large
2532 model programs. It is up to the Makefile to use this.
2534 mips_type (usrinc.U):
2535 This variable holds the environment type for the mips system.
2536 Possible values are "BSD 4.3" and "System V".
2539 This variable is used internally by Configure to determine the
2540 full pathname (if any) of the mkdir program. After Configure runs,
2541 the value is reset to a plain "mkdir" and is not useful.
2543 mmaptype (d_mmap.U):
2544 This symbol contains the type of pointer returned by mmap()
2545 (and simultaneously the type of the first argument).
2546 It can be 'void *' or 'caddr_t'.
2549 This variable contains the list of memory models supported by this
2550 system. Possible component values are none, split, unsplit, small,
2551 medium, large, and huge. The component values are space separated.
2553 modetype (modetype.U):
2554 This variable defines modetype to be something like mode_t,
2555 int, unsigned short, or whatever type is used to declare file
2556 modes for system calls.
2559 This variable is used internally by Configure to determine the
2560 full pathname (if any) of the more program. After Configure runs,
2561 the value is reset to a plain "more" and is not useful.
2563 multiarch (multiarch.U):
2564 This variable conditionally defines the MULTIARCH symbol
2565 which signifies the presence of multiplatform files.
2566 This is normally set by hints files.
2569 This variable is defined but not used by Configure.
2570 The value is a plain '' and is not useful.
2572 myarchname (archname.U):
2573 This variable holds the architecture name computed by Configure in
2574 a previous run. It is not intended to be perused by any user and
2575 should never be set in a hint file.
2577 mydomain (myhostname.U):
2578 This variable contains the eventual value of the MYDOMAIN symbol,
2579 which is the domain of the host the program is going to run on.
2580 The domain must be appended to myhostname to form a complete host name.
2581 The dot comes with mydomain, and need not be supplied by the program.
2583 myhostname (myhostname.U):
2584 This variable contains the eventual value of the MYHOSTNAME symbol,
2585 which is the name of the host the program is going to run on.
2586 The domain is not kept with hostname, but must be gotten from mydomain.
2587 The dot comes with mydomain, and need not be supplied by the program.
2589 myuname (Oldconfig.U):
2590 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2591 pseudo variables assignments in the output are stripped, thank you. The
2592 whole thing is then lower-cased.
2595 This variable contains the '-n' flag if that is what causes the echo
2596 command to suppress newline. Otherwise it is null. Correct usage is
2597 $echo $n "prompt for a question: $c".
2599 netdb_hlen_type (netdbtype.U):
2600 This variable holds the type used for the 2nd argument to
2601 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2602 This is only useful if you have gethostbyaddr(), naturally.
2604 netdb_host_type (netdbtype.U):
2605 This variable holds the type used for the 1st argument to
2606 gethostbyaddr(). Usually, this is char * or void *, possibly
2607 with or without a const prefix.
2608 This is only useful if you have gethostbyaddr(), naturally.
2610 netdb_name_type (netdbtype.U):
2611 This variable holds the type used for the argument to
2612 gethostbyname(). Usually, this is char * or const char *.
2613 This is only useful if you have gethostbyname(), naturally.
2615 netdb_net_type (netdbtype.U):
2616 This variable holds the type used for the 1st argument to
2617 getnetbyaddr(). Usually, this is int or long.
2618 This is only useful if you have getnetbyaddr(), naturally.
2621 This variable is used internally by Configure to determine the
2622 full pathname (if any) of the nm program. After Configure runs,
2623 the value is reset to a plain "nm" and is not useful.
2626 This variable holds the options that may be necessary for nm.
2628 nm_so_opt (usenm.U):
2629 This variable holds the options that may be necessary for nm
2630 to work on a shared library but that can not be used on an
2631 archive library. Currently, this is only used by Linux, where
2632 nm --dynamic is *required* to get symbols from an ELF library which
2633 has been stripped, but nm --dynamic is *fatal* on an archive library.
2634 Maybe Linux should just always set usenm=false.
2636 nonxs_ext (Extensions.U):
2637 This variable holds a list of all non-xs extensions included
2638 in the package. All of them will be built.
2641 This variable is used internally by Configure to determine the
2642 full pathname (if any) of the nroff program. After Configure runs,
2643 the value is reset to a plain "nroff" and is not useful.
2646 This variable is the size of an NV in bytes.
2649 This variable contains the C type used for Perl's NV.
2651 o_nonblock (nblock_io.U):
2652 This variable bears the symbol value to be used during open() or fcntl()
2653 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2654 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2655 but that is only supported by some devices.
2658 This is an old synonym for _o.
2660 old_pthread_create_joinable (d_pthrattrj.U):
2661 This variable defines the constant to use for creating joinable
2662 (aka undetached) pthreads. Unused if pthread.h defines
2663 PTHREAD_CREATE_JOINABLE. If used, possible values are
2664 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2666 optimize (ccflags.U):
2667 This variable contains any optimizer/debugger flag that should be used.
2668 It is up to the Makefile to use it.
2670 orderlib (orderlib.U):
2671 This variable is "true" if the components of libraries must be ordered
2672 (with `lorder $* | tsort`) before placing them in an archive. Set to
2673 "false" if ranlib or ar can generate random libraries.
2675 osname (Oldconfig.U):
2676 This variable contains the operating system name (e.g. sunos,
2677 solaris, hpux, etc.). It can be useful later on for setting
2678 defaults. Any spaces are replaced with underscores. It is set
2679 to a null string if we can't figure it out.
2681 osvers (Oldconfig.U):
2682 This variable contains the operating system version (e.g.
2683 4.1.3, 5.2, etc.). It is primarily used for helping select
2684 an appropriate hints file, but might be useful elsewhere for
2685 setting defaults. It is set to '' if we can't figure it out.
2686 We try to be flexible about how much of the version number
2687 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
2688 same for this package, hints files might just be os_4.0 or
2689 os_4.1, etc., not keeping separate files for each little release.
2691 package (package.U):
2692 This variable contains the name of the package being constructed.
2693 It is primarily intended for the use of later Configure units.
2696 This variable contains the name of the preferred pager on the system.
2697 Usual values are (the full pathnames of) more, less, pg, or cat.
2700 This variable contains a command that produces the text of the
2701 /etc/passwd file. This is normally "cat /etc/passwd", but can be
2702 "ypcat passwd" when NIS is used.
2703 On some systems, such as os390, there may be no equivalent
2704 command, in which case this variable is unset.
2706 patchlevel (patchlevel.U):
2707 The patchlevel level of this package.
2708 The value of patchlevel comes from the patchlevel.h file.
2709 In a version number such as 5.6.1, this is the "6".
2710 In patchlevel.h, this is referred to as the "PERL_VERSION".
2713 This is an old synonym for p_ in Head.U, the character
2714 used to separate elements in the command shell search PATH.
2717 This variable is used internally by Configure to determine the
2718 full pathname (if any) of the perl program. After Configure runs,
2719 the value is reset to a plain "perl" and is not useful.
2721 PERL_REVISION (Oldsyms.U):
2722 In a Perl version number such as 5.6.2, this is the 5.
2723 This value is manually set in patchlevel.h
2725 PERL_SUBVERSION (Oldsyms.U):
2726 In a Perl version number such as 5.6.2, this is the 2.
2727 Values greater than 50 represent potentially unstable
2728 development subversions.
2729 This value is manually set in patchlevel.h
2731 PERL_VERSION (Oldsyms.U):
2732 In a Perl version number such as 5.6.2, this is the 6.
2733 This value is manually set in patchlevel.h
2735 perladmin (perladmin.U):
2736 Electronic mail address of the perl5 administrator.
2738 perlpath (perlpath.U):
2739 This variable contains the eventual value of the PERLPATH symbol,
2740 which contains the name of the perl interpreter to be used in
2741 shell scripts and in the "eval 'exec'" idiom.
2744 This variable is used internally by Configure to determine the
2745 full pathname (if any) of the pg program. After Configure runs,
2746 the value is reset to a plain "pg" and is not useful.
2748 phostname (myhostname.U):
2749 This variable contains the eventual value of the PHOSTNAME symbol,
2750 which is a command that can be fed to popen() to get the host name.
2751 The program should probably not presume that the domain is or isn't
2754 pidtype (pidtype.U):
2755 This variable defines PIDTYPE to be something like pid_t, int,
2756 ushort, or whatever type is used to declare process ids in the kernel.
2759 Holds the private path used by Configure to find out the libraries.
2760 Its value is prepend to libpth. This variable takes care of special
2761 machines, like the mips. Usually, it should be empty.
2763 pm_apiversion (xs_apiversion.U):
2764 This variable contains the version of the oldest perl
2765 compatible with the present perl. (That is, pure perl modules
2766 written for $pm_apiversion will still work for the current
2767 version). perl.c:incpush() and lib/lib.pm will automatically
2768 search in $sitelib for older directories across major versions
2769 back to pm_apiversion. This is only useful if you have a perl
2770 library directory tree structured like the default one. The
2771 versioned site_perl library was introduced in 5.005, so that's
2772 the default setting for this variable. It's hard to imagine
2773 it changing before Perl6. It is included here for symmetry
2774 with xs_apiveprsion -- the searching algorithms will
2775 (presumably) be similar.
2776 See the INSTALL file for how this works.
2779 This variable is defined but not used by Configure.
2780 The value is a plain '' and is not useful.
2783 This variable is defined but not used by Configure.
2784 The value is a plain '' and is not useful.
2787 This variable holds the name of the directory below which the
2788 user will install the package. Usually, this is /usr/local, and
2789 executables go in /usr/local/bin, library stuff in /usr/local/lib,
2790 man pages in /usr/local/man, etc. It is only used to set defaults
2791 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
2793 prefixexp (prefix.U):
2794 This variable holds the full absolute path of the directory below
2795 which the user will install the package. Derived from prefix.
2797 privlib (privlib.U):
2798 This variable contains the eventual value of the PRIVLIB symbol,
2799 which is the name of the private library for this package. It may
2800 have a ~ on the front. It is up to the makefile to eventually create
2801 this directory while performing installation (with ~ substitution).
2803 privlibexp (privlib.U):
2804 This variable is the ~name expanded version of privlib, so that you
2805 may use it directly in Makefiles or shell scripts.
2807 prototype (prototype.U):
2808 This variable holds the eventual value of CAN_PROTOTYPE, which
2809 indicates the C compiler can handle funciton prototypes.
2811 ptrsize (ptrsize.U):
2812 This variable contains the value of the PTRSIZE symbol, which
2813 indicates to the C program how many bytes there are in a pointer.
2815 quadkind (quadtype.U):
2816 This variable, if defined, encodes the type of a quad:
2817 1 = int, 2 = long, 3 = long long, 4 = int64_t.
2819 quadtype (quadtype.U):
2820 This variable defines Quad_t to be something like long, int,
2821 long long, int64_t, or whatever type is used for 64-bit integers.
2823 randbits (randfunc.U):
2824 Indicates how many bits are produced by the function used to
2825 generate normalized random numbers.
2827 randfunc (randfunc.U):
2828 Indicates the name of the random number function to use.
2829 Values include drand48, random, and rand. In C programs,
2830 the 'Drand01' macro is defined to generate uniformly distributed
2831 random numbers over the range [0., 1.[ (see drand01 and nrand).
2833 randseedtype (randfunc.U):
2834 Indicates the type of the argument of the seedfunc.
2836 ranlib (orderlib.U):
2837 This variable is set to the pathname of the ranlib program, if it is
2838 needed to generate random libraries. Set to ":" if ar can generate
2839 random libraries or if random libraries are not supported
2841 rd_nodata (nblock_io.U):
2842 This variable holds the return code from read() when no data is
2843 present. It should be -1, but some systems return 0 when O_NDELAY is
2844 used, which is a shame because you cannot make the difference between
2845 no data and an EOF.. Sigh!
2848 This variable is used internally by Configure to determine the
2849 full pathname (if any) of the rm program. After Configure runs,
2850 the value is reset to a plain "rm" and is not useful.
2853 This variable is defined but not used by Configure.
2854 The value is a plain '' and is not useful.
2857 This variable contains 'true' or 'false' depending whether the
2858 nm extraction should be performed or not, according to the value
2859 of usenm and the flags on the Configure command line.
2861 sched_yield (d_pthread_y.U):
2862 This variable defines the way to yield the execution
2863 of the current thread.
2865 scriptdir (scriptdir.U):
2866 This variable holds the name of the directory in which the user wants
2867 to put publicly scripts for the package in question. It is either
2868 the same directory as for binaries, or a special one that can be
2869 mounted across different architectures, like /usr/share. Programs
2870 must be prepared to deal with ~name expansion.
2872 scriptdirexp (scriptdir.U):
2873 This variable is the same as scriptdir, but is filename expanded
2874 at configuration time, for programs not wanting to bother with it.
2877 This variable is used internally by Configure to determine the
2878 full pathname (if any) of the sed program. After Configure runs,
2879 the value is reset to a plain "sed" and is not useful.
2881 seedfunc (randfunc.U):
2882 Indicates the random number generating seed function.
2883 Values include srand48, srandom, and srand.
2885 selectminbits (selectminbits.U):
2886 This variable holds the minimum number of bits operated by select.
2887 That is, if you do select(n, ...), how many bits at least will be
2888 cleared in the masks if some activity is detected. Usually this
2889 is either n or 32*ceil(n/32), especially many little-endians do
2890 the latter. This is only useful if you have select(), naturally.
2892 selecttype (selecttype.U):
2893 This variable holds the type used for the 2nd, 3rd, and 4th
2894 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
2895 is defined, and 'int *' otherwise. This is only useful if you
2896 have select(), naturally.
2899 This variable is defined but not used by Configure.
2900 The value is a plain '' and is not useful.
2903 This variable contains the full pathname of the shell used
2904 on this system to execute Bourne shell scripts. Usually, this will be
2905 /bin/sh, though it's possible that some systems will have /bin/ksh,
2906 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
2908 This unit comes before Options.U, so you can't set sh with a '-D'
2909 option, though you can override this (and startsh)
2910 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
2913 This variable is defined but not used by Configure.
2914 The value is a plain '' and is not useful.
2916 sharpbang (spitshell.U):
2917 This variable contains the string #! if this system supports that
2920 shmattype (d_shmat.U):
2921 This symbol contains the type of pointer returned by shmat().
2922 It can be 'void *' or 'char *'.
2924 shortsize (intsize.U):
2925 This variable contains the value of the SHORTSIZE symbol which
2926 indicates to the C program how many bytes there are in a short.
2928 shrpenv (libperl.U):
2929 If the user builds a shared libperl.so, then we need to tell the
2930 'perl' executable where it will be able to find the installed libperl.so.
2931 One way to do this on some systems is to set the environment variable
2932 LD_RUN_PATH to the directory that will be the final location of the
2933 shared libperl.so. The makefile can use this with something like
2934 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
2936 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
2939 See the main perl Makefile.SH for actual working usage.
2940 Alternatively, we might be able to use a command line option such
2941 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
2942 $archlibexp/CORE (Linux).
2944 shsharp (spitshell.U):
2945 This variable tells further Configure units whether your sh can
2948 sig_count (sig_name.U):
2949 This variable holds a number larger than the largest valid
2950 signal number. This is usually the same as the NSIG macro.
2952 sig_name (sig_name.U):
2953 This variable holds the signal names, space separated. The leading
2954 SIG in signal name is removed. A ZERO is prepended to the
2955 list. This is currently not used.
2957 sig_name_init (sig_name.U):
2958 This variable holds the signal names, enclosed in double quotes and
2959 separated by commas, suitable for use in the SIG_NAME definition
2960 below. A "ZERO" is prepended to the list, and the list is
2961 terminated with a plain 0. The leading SIG in signal names
2962 is removed. See sig_num.
2964 sig_num (sig_name.U):
2965 This variable holds the signal numbers, space separated. A ZERO is
2966 prepended to the list (corresponding to the fake SIGZERO), and
2967 the list is terminated with a 0. Those numbers correspond to
2968 the value of the signal listed in the same place within the
2971 sig_num_init (sig_name.U):
2972 This variable holds the signal numbers, enclosed in double quotes and
2973 separated by commas, suitable for use in the SIG_NUM definition
2974 below. A "ZERO" is prepended to the list, and the list is
2975 terminated with a plain 0.
2977 signal_t (d_voidsig.U):
2978 This variable holds the type of the signal handler (void or int).
2980 sitearch (sitearch.U):
2981 This variable contains the eventual value of the SITEARCH symbol,
2982 which is the name of the private library for this package. It may
2983 have a ~ on the front. It is up to the makefile to eventually create
2984 this directory while performing installation (with ~ substitution).
2985 The standard distribution will put nothing in this directory.
2986 After perl has been installed, users may install their own local
2987 architecture-dependent modules in this directory with
2988 MakeMaker Makefile.PL
2989 or equivalent. See INSTALL for details.
2991 sitearchexp (sitearch.U):
2992 This variable is the ~name expanded version of sitearch, so that you
2993 may use it directly in Makefiles or shell scripts.
2995 sitebin (sitebin.U):
2996 This variable holds the name of the directory in which the user wants
2997 to put add-on publicly executable files for the package in question. It
2998 is most often a local directory such as /usr/local/bin. Programs using
2999 this variable must be prepared to deal with ~name substitution.
3000 The standard distribution will put nothing in this directory.
3001 After perl has been installed, users may install their own local
3002 executables in this directory with
3003 MakeMaker Makefile.PL
3004 or equivalent. See INSTALL for details.
3006 sitebinexp (sitebin.U):
3007 This is the same as the sitebin variable, but is filename expanded at
3008 configuration time, for use in your makefiles.
3010 sitelib (sitelib.U):
3011 This variable contains the eventual value of the SITELIB symbol,
3012 which is the name of the private library for this package. It may
3013 have a ~ on the front. It is up to the makefile to eventually create
3014 this directory while performing installation (with ~ substitution).
3015 The standard distribution will put nothing in this directory.
3016 After perl has been installed, users may install their own local
3017 architecture-independent modules in this directory with
3018 MakeMaker Makefile.PL
3019 or equivalent. See INSTALL for details.
3021 sitelibexp (sitelib.U):
3022 This variable is the ~name expanded version of sitelib, so that you
3023 may use it directly in Makefiles or shell scripts.
3025 siteprefix (siteprefix.U):
3026 This variable holds the full absolute path of the directory below
3027 which the user will install add-on packages.
3028 See INSTALL for usage and examples.
3030 siteprefixexp (siteprefix.U):
3031 This variable holds the full absolute path of the directory below
3032 which the user will install add-on packages. Derived from siteprefix.
3034 sizetype (sizetype.U):
3035 This variable defines sizetype to be something like size_t,
3036 unsigned long, or whatever type is used to declare length
3037 parameters for string functions.
3040 This variable is defined but not used by Configure.
3041 The value is a plain '' and is not useful.
3044 This variable is defined but not used by Configure.
3045 The value is a plain '' and is not useful.
3048 This variable contains a flag which will tell the C compiler and loader
3049 to produce a program running with a small memory model. It is up to
3050 the Makefile to use this.
3053 This variable holds the extension used to identify shared libraries
3054 (also known as shared objects) on the system. Usually set to 'so'.
3056 sockethdr (d_socket.U):
3057 This variable has any cpp '-I' flags needed for socket support.
3059 socketlib (d_socket.U):
3060 This variable has the names of any libraries needed for socket support.
3063 This variable is used internally by Configure to determine the
3064 full pathname (if any) of the sort program. After Configure runs,
3065 the value is reset to a plain "sort" and is not useful.
3067 spackage (package.U):
3068 This variable contains the name of the package being constructed,
3069 with the first letter uppercased, i.e. suitable for starting
3072 spitshell (spitshell.U):
3073 This variable contains the command necessary to spit out a runnable
3074 shell on this system. It is either cat or a grep '-v' for # comments.
3077 This variable contains a flag which will tell the C compiler and loader
3078 to produce a program that will run in separate I and D space, for those
3079 machines that support separation of instruction and data space. It is
3080 up to the Makefile to use this.
3082 sPRId64 (quadfio.U):
3083 This variable, if defined, contains the string used by stdio to
3084 format 64-bit decimal numbers (format 'd') for output.
3086 sPRIeldbl (longdblfio.U):
3087 This variable, if defined, contains the string used by stdio to
3088 format long doubles (format 'e') for output.
3090 sPRIEldbl (longdblfio.U):
3091 This variable, if defined, contains the string used by stdio to
3092 format long doubles (format 'E') for output.
3094 sPRIfldbl (longdblfio.U):
3095 This variable, if defined, contains the string used by stdio to
3096 format long doubles (format 'f') for output.
3098 sPRIFldbl (longdblfio.U):
3099 This variable, if defined, contains the string used by stdio to
3100 format long doubles (format 'F') for output.
3102 sPRIgldbl (longdblfio.U):
3103 This variable, if defined, contains the string used by stdio to
3104 format long doubles (format 'g') for output.
3106 sPRIGldbl (longdblfio.U):
3107 This variable, if defined, contains the string used by stdio to
3108 format long doubles (format 'G') for output.
3110 sPRIi64 (quadfio.U):
3111 This variable, if defined, contains the string used by stdio to
3112 format 64-bit decimal numbers (format 'i') for output.
3114 sPRIo64 (quadfio.U):
3115 This variable, if defined, contains the string used by stdio to
3116 format 64-bit octal numbers (format 'o') for output.
3118 sPRIu64 (quadfio.U):
3119 This variable, if defined, contains the string used by stdio to
3120 format 64-bit unsigned decimal numbers (format 'u') for output.
3122 sPRIx64 (quadfio.U):
3123 This variable, if defined, contains the string used by stdio to
3124 format 64-bit hexadecimal numbers (format 'x') for output.
3126 sPRIX64 (quadfio.U):
3127 This variable, if defined, contains the string used by stdio to
3128 format 64-bit hExADECimAl numbers (format 'X') for output.
3131 This variable holds the path to the package source. It is up to
3132 the Makefile to use this variable and set VPATH accordingly to
3133 find the sources remotely.
3135 ssizetype (ssizetype.U):
3136 This variable defines ssizetype to be something like ssize_t,
3137 long or int. It is used by functions that return a count
3138 of bytes or an error condition. It must be a signed type.
3139 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
3141 startperl (startperl.U):
3142 This variable contains the string to put on the front of a perl
3143 script to make sure (hopefully) that it runs with perl and not some
3144 shell. Of course, that leading line must be followed by the classical
3146 eval 'exec perl -S $0 ${1+"$@"}'
3147 if $running_under_some_shell;
3148 to guarantee perl startup should the shell execute the script. Note
3149 that this magic incatation is not understood by csh.
3151 startsh (startsh.U):
3152 This variable contains the string to put on the front of a shell
3153 script to make sure (hopefully) that it runs with sh and not some
3156 static_ext (Extensions.U):
3157 This variable holds a list of XS extension files we want to
3158 link statically into the package. It is used by Makefile.
3160 stdchar (stdchar.U):
3161 This variable conditionally defines STDCHAR to be the type of char
3162 used in stdio.h. It has the values "unsigned char" or "char".
3164 stdio_base (d_stdstdio.U):
3165 This variable defines how, given a FILE pointer, fp, to access the
3166 _base field (or equivalent) of stdio.h's FILE structure. This will
3167 be used to define the macro FILE_base(fp).
3169 stdio_bufsiz (d_stdstdio.U):
3170 This variable defines how, given a FILE pointer, fp, to determine
3171 the number of bytes store in the I/O buffer pointer to by the
3172 _base field (or equivalent) of stdio.h's FILE structure. This will
3173 be used to define the macro FILE_bufsiz(fp).
3175 stdio_cnt (d_stdstdio.U):
3176 This variable defines how, given a FILE pointer, fp, to access the
3177 _cnt field (or equivalent) of stdio.h's FILE structure. This will
3178 be used to define the macro FILE_cnt(fp).
3180 stdio_filbuf (d_stdstdio.U):
3181 This variable defines how, given a FILE pointer, fp, to tell
3182 stdio to refill it's internal buffers (?). This will
3183 be used to define the macro FILE_filbuf(fp).
3185 stdio_ptr (d_stdstdio.U):
3186 This variable defines how, given a FILE pointer, fp, to access the
3187 _ptr field (or equivalent) of stdio.h's FILE structure. This will
3188 be used to define the macro FILE_ptr(fp).
3190 stdio_stream_array (stdio_streams.U):
3191 This variable tells the name of the array holding the stdio streams.
3192 Usual values include _iob, __iob, and __sF.
3194 strings (i_string.U):
3195 This variable holds the full path of the string header that will be
3196 used. Typically /usr/include/string.h or /usr/include/strings.h.
3199 This variable is defined but not used by Configure.
3200 The value is a plain '' and is not useful.
3202 subversion (patchlevel.U):
3203 The subversion level of this package.
3204 The value of subversion comes from the patchlevel.h file.
3205 In a version number such as 5.6.1, this is the "1".
3206 This is unique to perl.
3209 This variable holds the place where the manual is located on this
3210 system. It is not the place where the user wants to put his manual
3211 pages. Rather it is the place where Configure may look to find manual
3212 for unix commands (section 1 of the manual usually). See mansrc.
3215 This variable is defined but not used by Configure.
3216 The value is a plain '' and is not useful.
3219 This variable is defined but not used by Configure.
3220 The value is a plain '' and is not useful.
3223 This variable is defined but not used by Configure.
3224 The value is a plain '' and is not useful.
3227 This variable is defined but not used by Configure.
3228 The value is a plain '' and is not useful.
3231 This variable is used internally by Configure to determine the
3232 full pathname (if any) of the test program. After Configure runs,
3233 the value is reset to a plain "test" and is not useful.
3235 timeincl (i_time.U):
3236 This variable holds the full path of the included time header(s).
3238 timetype (d_time.U):
3239 This variable holds the type returned by time(). It can be long,
3240 or time_t on BSD sites (in which case <sys/types.h> should be
3241 included). Anyway, the type Time_t should be used.
3244 This variable is used internally by Configure to determine the
3245 full pathname (if any) of the touch program. After Configure runs,
3246 the value is reset to a plain "touch" and is not useful.
3249 This variable is used internally by Configure to determine the
3250 full pathname (if any) of the tr program. After Configure runs,
3251 the value is reset to a plain "tr" and is not useful.
3254 This variable contains the value to be passed to the tr(1)
3255 command to transliterate a newline. Typical values are
3256 '\012' and '\n'. This is needed for EBCDIC systems where
3257 newline is not necessarily '\012'.
3260 This variable is defined but not used by Configure.
3261 The value is a plain '' and is not useful.
3264 This variable is the size of an U16 in bytes.
3267 This variable contains the C type used for Perl's U16.
3270 This variable is the size of an U32 in bytes.
3273 This variable contains the C type used for Perl's U32.
3276 This variable is the size of an U64 in bytes.
3279 This variable contains the C type used for Perl's U64.
3282 This variable is the size of an U8 in bytes.
3285 This variable contains the C type used for Perl's U8.
3288 This variable contains the format string used for printing a Uid_t.
3290 uidsign (uidsign.U):
3291 This variable contains the signedness of a uidtype.
3292 1 for unsigned, -1 for signed.
3294 uidsize (uidsize.U):
3295 This variable contains the size of a uidtype in bytes.
3297 uidtype (uidtype.U):
3298 This variable defines Uid_t to be something like uid_t, int,
3299 ushort, or whatever type is used to declare user ids in the kernel.
3302 This variable is used internally by Configure to determine the
3303 full pathname (if any) of the uname program. After Configure runs,
3304 the value is reset to a plain "uname" and is not useful.
3307 This variable is used internally by Configure to determine the
3308 full pathname (if any) of the uniq program. After Configure runs,
3309 the value is reset to a plain "uniq" and is not useful.
3311 uquadtype (quadtype.U):
3312 This variable defines Uquad_t to be something like unsigned long,
3313 unsigned int, unsigned long long, uint64_t, or whatever type is
3314 used for 64-bit integers.
3316 use5005threads (usethreads.U):
3317 This variable conditionally defines the USE_5005THREADS symbol,
3318 and indicates that Perl should be built to use the 5.005-based
3319 threading implementation.
3321 use64bits (use64bits.U):
3322 This variable conditionally defines the USE_64_BITS symbol,
3323 and indicates that 64-bit integer types should be used
3327 This variable indicates if the system supports dynamic
3328 loading of some sort. See also dlsrc and dlobj.
3330 useithreads (usethreads.U):
3331 This variable conditionally defines the USE_ITHREADS symbol,
3332 and indicates that Perl should be built to use the interpreter-based
3333 threading implementation.
3335 uselargefiles (uselfs.U):
3336 This variable conditionally defines the USE_LARGE_FILES symbol,
3337 and indicates that large file interfaces should be used when
3338 available. The use64bits symbol will also be turned on if necessary.
3340 uselongdouble (uselongdbl.U):
3341 This variable conditionally defines the USE_LONG_DOUBLE symbol,
3342 and indicates that long doubles should be used when available.
3344 usemorebits (usemorebits.U):
3345 This variable conditionally defines the USE_MORE_BITS symbol,
3346 and indicates that explicit 64-bit interfaces and long doubles
3347 should be used when available.
3349 usemultiplicity (usemultiplicity.U):
3350 This variable conditionally defines the MULTIPLICITY symbol,
3351 and indicates that Perl should be built to use multiplicity.
3353 usemymalloc (mallocsrc.U):
3354 This variable contains y if the malloc that comes with this package
3355 is desired over the system's version of malloc. People often include
3356 special versions of malloc for effiency, but such versions are often
3357 less portable. See also mallocsrc and mallocobj.
3358 If this is 'y', then -lmalloc is removed from $libs.
3361 This variable contains 'true' or 'false' depending whether the
3362 nm extraction is wanted or not.
3364 useopcode (Extensions.U):
3365 This variable holds either 'true' or 'false' to indicate
3366 whether the Opcode extension should be used. The sole
3367 use for this currently is to allow an easy mechanism
3368 for users to skip the Opcode extension from the Configure
3371 useperlio (useperlio.U):
3372 This variable conditionally defines the USE_PERLIO symbol,
3373 and indicates that the PerlIO abstraction should be
3376 useposix (Extensions.U):
3377 This variable holds either 'true' or 'false' to indicate
3378 whether the POSIX extension should be used. The sole
3379 use for this currently is to allow an easy mechanism
3380 for hints files to indicate that POSIX will not compile
3381 on a particular system.
3384 This variable is set to true when the user agrees to use sfio.
3385 It is set to false when sfio is not available or when the user
3386 explicitely requests not to use sfio. It is here primarily so
3387 that command-line settings can override the auto-detection of
3388 d_sfio without running into a "WHOA THERE".
3390 useshrplib (libperl.U):
3391 This variable is set to 'yes' if the user wishes
3392 to build a shared libperl, and 'no' otherwise.
3394 usesocks (usesocks.U):
3395 This variable conditionally defines the USE_SOCKS symbol,
3396 and indicates that Perl should be built to use SOCKS.
3398 usethreads (usethreads.U):
3399 This variable conditionally defines the USE_THREADS symbol,
3400 and indicates that Perl should be built to use threads.
3402 usevendorprefix (vendorprefix.U):
3403 This variable tells whether the vendorprefix
3404 and consequently other vendor* paths are in use.
3406 usevfork (d_vfork.U):
3407 This variable is set to true when the user accepts to use vfork.
3408 It is set to false when no vfork is available or when the user
3409 explicitely requests not to use vfork.
3412 This variable holds the path of the include files, which is
3413 usually /usr/include. It is mainly used by other Configure units.
3416 This variable is defined but not used by Configure.
3417 The value is a plain '' and is not useful.
3419 uvoformat (perlxvf.U):
3420 This variable contains the format string used for printing
3421 a Perl UV as an unsigned octal integer.
3424 This variable is the size of a UV in bytes.
3427 This variable contains the C type used for Perl's UV.
3429 uvuformat (perlxvf.U):
3430 This variable contains the format string used for printing
3431 a Perl UV as an unsigned decimal integer.
3433 uvxformat (perlxvf.U):
3434 This variable contains the format string used for printing
3435 a Perl UV as an unsigned hexadecimal integer.
3437 vendorbin (vendorbin.U):
3438 This variable contains the eventual value of the VENDORBIN symbol.
3439 It may have a ~ on the front.
3440 The standard distribution will put nothing in this directory.
3441 Vendors who distribute perl may wish to place additional
3442 binaries in this directory with
3443 MakeMaker Makefile.PL INSTALLDIRS=vendor
3444 or equivalent. See INSTALL for details.
3446 vendorbinexp (vendorbin.U):
3447 This variable is the ~name expanded version of vendorbin, so that you
3448 may use it directly in Makefiles or shell scripts.
3450 vendorlib (vendorlib.U):
3451 This variable contains the eventual value of the VENDORLIB symbol,
3452 which is the name of the private library for this package.
3453 The standard distribution will put nothing in this directory.
3454 Vendors who distribute perl may wish to place their own
3455 modules in this directory with
3456 MakeMaker Makefile.PL INSTALLDIRS=vendor
3457 or equivalent. See INSTALL for details.
3459 vendorlibexp (vendorlib.U):
3460 This variable is the ~name expanded version of vendorlib, so that you
3461 may use it directly in Makefiles or shell scripts.
3463 vendorprefix (vendorprefix.U):
3464 This variable holds the full absolute path of the directory below
3465 which the vendor will install add-on packages.
3466 See INSTALL for usage and examples.
3468 vendorprefixexp (vendorprefix.U):
3469 This variable holds the full absolute path of the directory below
3470 which the vendor will install add-on packages. Derived from vendorprefix.
3472 version (patchlevel.U):
3473 The full version number of this package, such as 5.6.1 (or 5_6_1).
3474 This combines baserev, patchlevel, and subversion to get the
3475 full version number, including any possible subversions.
3476 This is suitable for use as a directory name, and hence is
3477 filesystem dependent.
3480 This variable is defined but not used by Configure.
3481 The value is a plain '' and is not useful.
3483 voidflags (voidflags.U):
3484 This variable contains the eventual value of the VOIDFLAGS symbol,
3485 which indicates how much support of the void type is given by this
3486 compiler. See VOIDFLAGS for more info.
3489 This variable holds extra path (space-separated) used to find
3490 libraries on this platform, for example CPU-specific libraries
3491 (on multi-CPU platforms) may be listed here.
3493 xs_apiversion (xs_apiversion.U):
3494 This variable contains the version of the oldest perl binary
3495 compatible with the present perl. perl.c:incpush() and
3496 lib/lib.pm will automatically search in $sitearch for older
3497 directories across major versions back to xs_apiversion.
3498 This is only useful if you have a perl library directory tree
3499 structured like the default one.
3500 See INSTALL for how this works.
3501 The versioned site_perl directory was introduced in 5.005,
3502 so that is the lowest possible value.
3503 Since this can depend on compile time options (such as
3504 bincompat) it is set by Configure. Other non-default sources
3505 of potential incompatibility, such as multiplicity, threads,
3506 debugging, 64bits, sfio, etc., are not checked for currently,
3507 though in principle we could go snooping around in old
3511 This variable is defined but not used by Configure.
3512 The value is a plain '' and is not useful.
3515 This variable is used internally by Configure to determine the
3516 full pathname (if any) of the zip program. After Configure runs,
3517 the value is reset to a plain "zip" and is not useful.